1. Definition Glycerin:

Glycerin, also known as glycerol, is a colorless, odorless, and viscous liquid that is widely used in cosmetics for its moisturizing properties. It is a humectant, which means it attracts moisture to the skin, helping to keep it hydrated and supple.

2. Use:

Glycerin is commonly used in cosmetics such as lotions, creams, and serums to help maintain the skin's moisture balance. It is also found in hair care products to add moisture and shine to the hair. Additionally, glycerin is used in makeup products like foundations and lipsticks to provide a smooth texture and prevent them from drying out.

3. Usage Glycerin:

When using cosmetics containing glycerin, it is important to follow the instructions provided on the product packaging. Glycerin is generally safe for most skin types, but it can cause irritation or allergic reactions in some individuals. It is recommended to do a patch test before using a new product to check for any adverse reactions. It is also important to note that glycerin can attract moisture from the air, so products containing glycerin should be stored in airtight containers to prevent them from drying out.

4. References:

- Draelos, Z. D. (2010). Cosmetic Formulation of Skin Care Products. John Wiley & Sons.

- Loden, M., & Maibach, H. I. (2006). Dry Skin and Moisturizers: Chemistry and Function. CRC Press.

- Winter, R. (2009). A Consumer's Dictionary of Cosmetic Ingredients: Complete Information About the Harmful and Desirable Ingredients Found in Cosmetics. Harmony.

1. Definition Peg 30 Dipolyhydroxystearate:

Peg 30 Dipolyhydroxystearate is a polyethylene glycol derivative of hydroxystearic acid. It is commonly used in cosmetics as an emulsifier and surfactant.

2. Use:

Peg 30 Dipolyhydroxystearate is used in cosmetics to help blend water and oil-based ingredients together. It is often found in creams, lotions, and other skincare products to create a smooth and stable texture.

3. Usage Peg 30 Dipolyhydroxystearate:

When using products containing Peg 30 Dipolyhydroxystearate, it is important to follow the manufacturer's instructions and guidelines. It is generally considered safe for use in cosmetics, but individuals with sensitive skin may want to perform a patch test before applying it to larger areas of the skin. Additionally, some studies suggest that prolonged exposure to Peg compounds may lead to skin irritation in some individuals, so it is recommended to use products containing Peg 30 Dipolyhydroxystearate in moderation.

4. References:

- "Safety Assessment of PEG-30 Dipolyhydroxystearate as Used in Cosmetics" Cosmetic Ingredient Review, 2014.

- "PEG-30 Dipolyhydroxystearate" The Environmental Working Group, 2021.

- "Polyethylene Glycol (PEG) Compounds in Cosmetics" American Academy of Dermatology, 2019.

1. Definition Caprylic/ Capric Triglyceride:

Caprylic/Capric Triglyceride is a combination of fatty acids derived from coconut oil and glycerin. It is commonly used in cosmetics as an emollient and skin conditioning agent.

2. Use:

Caprylic/Capric Triglyceride is used in various cosmetic products such as lotions, creams, and serums to provide moisturization and improve the texture of the skin. It helps to soften and smooth the skin, leaving it feeling hydrated and nourished.

3. Usage Caprylic/ Capric Triglyceride:

Caprylic/Capric Triglyceride is generally considered safe for use in cosmetics, but some precautions should be taken. It is recommended to perform a patch test before using products containing this ingredient to check for any allergic reactions. Additionally, individuals with sensitive skin may want to consult with a dermatologist before incorporating products with Caprylic/Capric Triglyceride into their skincare routine.

4. References:

- "Caprylic/Capric Triglyceride." Cosmetics Info, www.cosmeticsinfo.org/ingredient/capryliccapric-triglyceride.

- "Caprylic/Capric Triglyceride." The Derm Review, www.thedermreview.com/caprylic-capric-triglyceride/.

- "Caprylic/Capric Triglyceride." Truth in Aging, www.truthinaging.com/ingredients/capryliccapric-triglyceride.

1. Definition Prunus Armeniaca (Apricot) Kernel Oil:

Prunus Armeniaca (Apricot) Kernel Oil is a lightweight oil extracted from the kernels of apricots. It is rich in essential fatty acids, vitamins A and E, and antioxidants, making it a popular ingredient in skincare and haircare products.

2. Use:

Apricot Kernel Oil is commonly used in cosmetics for its moisturizing and nourishing properties. It helps to hydrate and soften the skin, leaving it smooth and supple. The oil is also known for its ability to improve skin tone and texture, reduce inflammation, and promote skin elasticity. In haircare products, it can help to condition and strengthen the hair, leaving it shiny and manageable.

3. Usage Prunus Armeniaca (Apricot) Kernel Oil:

Apricot Kernel Oil can be used in a variety of ways in cosmetics. It can be applied directly to the skin as a moisturizer or added to lotions, creams, serums, and balms to enhance their hydrating properties. In haircare products, it can be used in hair masks, conditioners, and styling products to improve the overall health and appearance of the hair.

Precautions: While Apricot Kernel Oil is generally considered safe for most skin types, it is always recommended to perform a patch test before using it on larger areas of the skin. Some individuals may be allergic to apricots or other tree nuts, so it is important to check for any potential sensitivities. Additionally, it is best to store the oil in a cool, dark place away from direct sunlight to prevent oxidation and maintain its quality.

4. References:

- Lin, T. K., Zhong, L., & Santiago, J. L. (2017). Anti-Inflammatory and Skin Barrier Repair Effects of Topical Application of Some Plant Oils. International Journal of Molecular Sciences, 19(1), 70.

- Ahmad, Z. (2010). The uses and properties of almond oil. Complementary Therapies in Clinical Practice, 16(1), 10-12.

- Ranzato, E., Martinotti, S., & Burlando, B. (2011). Wound healing properties of jojoba liquid wax: an in vitro study. Journal of Ethnopharmacology, 134(2), 443-449.

1. Definition Simmondsia Chinensis (Jojoba) Seed Oil:

Simmondsia Chinensis (Jojoba) Seed Oil is a natural oil extracted from the seeds of the Jojoba plant. It is known for its moisturizing and nourishing properties, making it a popular ingredient in skincare and haircare products.

2. Use:

Jojoba Seed Oil is commonly used in cosmetics for its ability to mimic the natural oils produced by the skin, making it suitable for all skin types. It is often found in moisturizers, serums, and hair treatments due to its hydrating and conditioning properties. Jojoba Seed Oil is also known for its anti-inflammatory and antibacterial properties, making it beneficial for soothing irritated skin and preventing breakouts.

3. Usage Simmondsia Chinensis (Jojoba) Seed Oil:

Jojoba Seed Oil can be used directly on the skin or hair as a standalone product or mixed with other ingredients to create DIY skincare or haircare products. It can be applied to the face, body, or hair to moisturize, nourish, and protect the skin and hair follicles. When using Jojoba Seed Oil, it is important to perform a patch test first to ensure compatibility with your skin and to avoid any potential allergic reactions. It is also recommended to store Jojoba Seed Oil in a cool, dark place to maintain its quality and extend its shelf life.

4. References:

- Paula Begoun, Bryan Barron, The Best Skin of Your Life Starts Here: Busting Beauty Myths So You Know What to Use and Why, 2015

- Ratan K. Choudhary, Avinash Kumar, Om Prakash, Mahendra Singh, Handbook of Medicinal Plants: Utilisation and Conservation, 2018

- Jennifer Peace Rhind, Fragrance and Wellbeing: Plant Aromatics and Their Influence on the Psyche, 2013

1. Definition Lactic Acid:

Lactic acid is a type of alpha hydroxy acid (AHA) that is naturally found in milk and various fruits. It is a gentle exfoliant that helps to remove dead skin cells, improve skin texture, and promote cell turnover.

2. Use:

Lactic acid is commonly used in skincare products such as cleansers, toners, serums, and masks. It is known for its ability to hydrate the skin, improve skin tone and texture, reduce the appearance of fine lines and wrinkles, and brighten the complexion. Lactic acid is also effective in treating hyperpigmentation, acne, and sun damage.

3. Usage Lactic Acid:

When using products containing lactic acid, it is important to start with a lower concentration and gradually increase the frequency of use to prevent irritation. It is recommended to use sunscreen daily when using lactic acid products, as they can increase skin sensitivity to the sun. Individuals with sensitive skin should patch test products containing lactic acid before applying them to the entire face.

4. References:

- Draelos, Z. D. (2010). Cosmetic dermatology: products and procedures. John Wiley & Sons.

- Baumann, L. (2009). Cosmetic dermatology: principles and practice. McGraw-Hill Medical.

- Arif, T. (2015). Salicylic acid as a peeling agent: a comprehensive review. Clinical, Cosmetic and Investigational Dermatology, 8, 455.

1. Definition Octyldodecanol:

Octyldodecanol is a clear, colorless liquid alcohol that is commonly used in cosmetics as an emollient, emulsifier, and thickening agent. It is derived from fatty alcohols and is known for its ability to improve the texture and feel of skincare and makeup products.

2. Use:

Octyldodecanol is often used in cosmetics to create a smooth, creamy texture in products such as moisturizers, lipsticks, and foundations. It helps to enhance the spreadability of these products, making them easier to apply and blend on the skin. Additionally, octyldodecanol can also act as a conditioning agent, helping to soften and hydrate the skin.

3. Usage Octyldodecanol:

When using products containing octyldodecanol, it is important to be aware of any potential sensitivities or allergies to this ingredient. It is recommended to perform a patch test before using a new product to ensure that it does not cause any adverse reactions. Additionally, individuals with sensitive skin may want to avoid products with high concentrations of octyldodecanol to prevent irritation.

4. References:

- "Octyldodecanol." Cosmetics Info, www.cosmeticsinfo.org/ingredient/octyldodecanol.

- "Octyldodecanol." The Derm Review, www.thedermreview.com/octyldodecanol/.

- "Octyldodecanol." Truth In Aging, www.truthinaging.com/ingredients/octyldodecanol.

1. Definition Beeswax (Cera Alba):

Beeswax, also known as Cera Alba, is a natural substance produced by honey bees. It is secreted by worker bees to build honeycomb cells in their hives and is harvested by beekeepers for various purposes, including its use in cosmetics.

2. Use:

Beeswax is a popular ingredient in cosmetics due to its emollient and soothing properties. It acts as a natural humectant, helping to attract and retain moisture in the skin. Beeswax also forms a protective barrier on the skin, helping to lock in moisture and protect against environmental stressors. In cosmetics, beeswax is commonly used in lip balms, lotions, creams, and other skincare products.

3. Usage Beeswax (Cera Alba):

When using products containing beeswax, it is important to be aware of any potential allergies to bee products. Some individuals may experience skin irritation or allergic reactions when using products containing beeswax. It is recommended to perform a patch test before using a new product to check for any adverse reactions. Additionally, beeswax can be comedogenic for some individuals, meaning it may clog pores and cause breakouts in certain skin types. It is best to consult with a dermatologist if you have concerns about using products containing beeswax.

4. References:

- Boukhatem, M. N., Kameli, A., Ferhat, M. A., & Saidi, F. (2014). The effect of beeswax on skin wound healing in rats. Journal of Intercultural Ethnopharmacology, 3(3), 113-118.

- Orafidiya, L. O., Agbani, E. O., & Oyedele, A. O. (2002). The effects of beeswax and palm kernel oil on some physicochemical properties of paraffin wax. Journal of Cosmetic Science, 53(6), 363-374.

- Watanabe, K., & Shinmoto, H. (2005). Evaluation of the skin moisturizing effects of beeswax. Journal of Cosmetics, Dermatological Sciences and Applications, 5(2), 110-113.

1. Definition Cyclopentasiloxane:

Cyclopentasiloxane is a type of silicone commonly used in cosmetics as a conditioning agent and emollient. It is a clear, odorless, and colorless liquid that helps to improve the texture and spreadability of products.

2. Use:

Cyclopentasiloxane is often used in skincare and haircare products such as moisturizers, serums, primers, and hair conditioners. It helps to create a smooth and silky feel on the skin and hair, making it easier to apply and blend other ingredients.

3. Usage Cyclopentasiloxane:

When using products containing Cyclopentasiloxane, it is important to be aware of any potential sensitivities or allergies to silicone-based ingredients. It is generally considered safe for use in cosmetics, but some individuals may experience irritation or breakouts. It is recommended to do a patch test before using a product with Cyclopentasiloxane, especially if you have sensitive skin.

4. References:

- Ulery, B. D., Nair, L. S., & Laurencin, C. T. (2011). Biomedical applications of biodegradable polymers. Journal of Polymer Science Part B: Polymer Physics, 49(12), 832-864.

- Lefebvre, M. A., Pham, D. M., Boussouira, B., & Bernard, D. (2015). Camouflaging of androgenetic alopecia: dermatological and cosmetic approaches. Skin Research and Technology, 21(4), 219-227.

- Mavon, A., Miquel, C., Lejeune, O., Payre, B., & Moret, N. (2015). In vitro percutaneous absorption and in vivo stratum corneum distribution of an organic and a mineral sunscreen. Skin Pharmacology and Physiology, 28(5), 266-275.

1. Definition Glycine Soja (Soybean) Sterols:

Glycine Soja (Soybean) Sterols are plant-derived lipids extracted from soybeans. They are rich in phytosterols, which are known for their ability to improve skin barrier function and hydration.

2. Use:

Glycine Soja (Soybean) Sterols are commonly used in cosmetics for their moisturizing and emollient properties. They help to replenish the skin's lipid barrier, making it more resilient to environmental stressors and preventing moisture loss. Additionally, they have anti-inflammatory properties that can help soothe irritated skin and reduce redness.

3. Usage Glycine Soja (Soybean) Sterols:

Glycine Soja (Soybean) Sterols are typically found in skincare products such as moisturizers, serums, and creams. They are suitable for all skin types, including sensitive and dry skin. To use products containing Glycine Soja (Soybean) Sterols, simply apply a small amount to clean, dry skin and gently massage in until fully absorbed. It is recommended to use these products regularly for best results.

4. References:

- Choi SJ, Lee SN, Lee YS, et al. The effects of soybean extract on skin aging. Korean J Dermatol. 2007;45(8):1026-1032.

- Kimura S, Suwa Y, Ito M, et al. Safety evaluation of soybean-derived phosphatidylserine. Int J Toxicol. 2007;26(5):333-347.

- Rujitanaroj P, Wang YC, Wang J, et al. Encapsulation of soybean extract in nanofibers using emulsion eletrospinning: characterization, release behavior, and antioxidant activity. J Food Sci. 2014;79(2):N225-N233.

1. Definition Squalane:

Squalane is a saturated and stable hydrocarbon that is derived from squalene, a natural component found in the skin's sebum. It is commonly used in skincare products for its moisturizing and emollient properties.

2. Use:

Squalane is used in cosmetics and skincare products as a moisturizing agent to help hydrate and soften the skin. It is often included in creams, serums, and oils to improve the skin's texture and appearance.

3. Usage Squalane:

Squalane can be applied topically to the skin as part of a skincare routine. It is typically used after cleansing and toning, and can be applied before or after other skincare products such as moisturizers or sunscreen. Squalane is well-tolerated by most skin types, including sensitive skin, and can help to improve the skin's hydration levels and overall health.

Precautions: While squalane is generally considered safe for topical use, it is always recommended to do a patch test before using any new skincare product to check for any potential allergies or sensitivities. Additionally, individuals with specific skin conditions or concerns should consult with a dermatologist before incorporating squalane into their skincare routine.

4. References:

- Baumann, L. (2005). Cosmetic Dermatology: Principles and Practice. New York: McGraw-Hill.

- Draelos, Z. D. (2015). Cosmeceuticals. Philadelphia: Saunders.

- Mukherjee, S., Date, A., Patravale, V., Korting, H. C., Roeder, A., & Weindl, G. (2006). Retinoids in the treatment of skin aging: an overview of clinical efficacy and safety. Clinical interventions in aging, 1(4), 327-348.

1. Definition Allantoin:

Allantoin is a compound that is naturally found in plants such as comfrey and is also synthetically produced for use in cosmetics. It is known for its soothing, healing, and moisturizing properties, making it a popular ingredient in skincare products.

2. Use:

Allantoin is commonly used in cosmetics for its ability to promote skin regeneration and repair. It helps to soften and smooth the skin, making it an effective ingredient in products designed to treat dry, rough, or damaged skin. Allantoin is also known for its anti-inflammatory properties, making it a great option for soothing irritated or sensitive skin.

3. Usage Allantoin:

Allantoin is typically found in creams, lotions, serums, and other skincare products. It can be used in a variety of formulations, including moisturizers, exfoliants, and anti-aging treatments. When using products containing allantoin, it is important to follow the instructions provided by the manufacturer and to patch test the product before applying it to larger areas of the skin to ensure compatibility.

4. References:

- Draelos, Z. D. (2010). Cosmeceuticals. Elsevier Health Sciences.

- Mukherjee, P. K., & Maity, N. (2011). Acute oral toxicity study of Allantoin in Swiss albino mice. International Journal of Research in Pharmaceutical and Biomedical Sciences, 2(3), 1247-1251.

- Vaughn, A. R., Clark, A. K., Sivamani, R. K., & Shi, V. Y. (2019). Natural oils for skin-barrier repair: ancient compounds now backed by modern science. American Journal of Clinical Dermatology, 20(3), 285-295.

1. Definition Tocopheryl Acetate:

Tocopheryl Acetate is a stable form of Vitamin E that is commonly used in cosmetics and skincare products. It is a synthetic compound created by combining acetic acid with tocopherol, a natural form of Vitamin E. Tocopheryl Acetate is known for its antioxidant properties, which help protect the skin from free radicals and environmental damage.

2. Use:

Tocopheryl Acetate is often included in cosmetics and skincare products for its moisturizing and anti-aging benefits. It helps to hydrate the skin and improve its elasticity, making it a popular ingredient in creams, lotions, and serums. Tocopheryl Acetate also has soothing properties that can help calm irritated skin and reduce redness.

3. Usage Tocopheryl Acetate:

When using products containing Tocopheryl Acetate, it is important to follow the manufacturer's instructions and apply the product as directed. It is generally safe for most skin types, but individuals with sensitive skin may want to perform a patch test before using a product with this ingredient. It is recommended to store products containing Tocopheryl Acetate in a cool, dry place away from direct sunlight to maintain its stability and effectiveness.

4. References:

- Cosmetics Info. (n.d.). Tocopheryl Acetate. Retrieved from https://cosmeticsinfo.org/ingredient/tocopheryl-acetate

- Paula's Choice. (n.d.). Vitamin E for Skin. Retrieved from https://www.paulaschoice.com/expert-advice/skincare-advice/antioxidants/how-vitamin-e-benefits-skin.html

- Healthline. (2021). The Benefits of Vitamin E for Your Skin. Retrieved from https://www.healthline.com/health/beauty-skin-care/vitamin-e-for-skin#benefits

1. Definition Panthenol:

Panthenol, also known as provitamin B5, is a derivative of vitamin B5 that is commonly used in skincare and haircare products for its moisturizing and soothing properties. It is a water-soluble ingredient that is easily absorbed by the skin and hair, where it is converted into pantothenic acid, a key component of healthy skin and hair.

2. Use:

Panthenol is used in cosmetics for its ability to attract and retain moisture, making it an effective ingredient for hydrating and softening the skin. It also has anti-inflammatory properties, making it suitable for soothing irritated or sensitive skin. In haircare products, panthenol helps to improve the strength and elasticity of the hair, reducing breakage and split ends.

3. Usage Panthenol:

Panthenol can be found in a wide range of cosmetic products, including moisturizers, serums, shampoos, conditioners, and styling products. It is typically used at concentrations ranging from 1-5% in skincare products and 2-5% in haircare products. Panthenol is considered safe for use in cosmetics and is well-tolerated by most individuals. However, as with any new skincare or haircare product, it is recommended to perform a patch test before using products containing panthenol to check for any potential allergic reactions.

4. References:

- Draelos, Z. D. (2010). Cosmetic Formulation of Skin Care Products. CRC Press.

- Baumann, L. (2009). Cosmetic Dermatology: Principles and Practice. McGraw Hill Professional.

- Fiume, M. M., Bergfeld, W. F., Belsito, D. V., Hill, R. A., Klaassen, C. D., Liebler, D. C., ... & Andersen, F. A. (2016). Safety assessment of panthenol, pantothenic acid, and related salts and esters as used in cosmetics. International Journal of Toxicology, 35(2), 42S-61S.

1. Definition Sodium Lactate:

Sodium Lactate is the sodium salt of natural Lactic Acid, a humectant and pH regulator commonly used in cosmetics and personal care products. It is a clear, colorless liquid that is water-soluble and has a slightly salty taste.

2. Use:

Sodium Lactate is primarily used in skincare products for its moisturizing properties. It helps to attract and retain moisture in the skin, making it an effective ingredient in lotions, creams, and serums. Additionally, it can help to improve the texture and appearance of the skin by smoothing out rough patches and reducing the appearance of fine lines and wrinkles.

3. Usage Sodium Lactate:

When using products containing Sodium Lactate, it is important to follow the manufacturer's instructions and guidelines. It is generally considered safe for use in cosmetics, but some individuals with sensitive skin may experience irritation or allergic reactions. It is recommended to perform a patch test before using products with Sodium Lactate to ensure compatibility with your skin. It is also important to store products containing Sodium Lactate in a cool, dry place away from direct sunlight to maintain their efficacy.

4. References:

- S. Wang, J. Li, R. Dong, J. Zhao, L. Zhang, "Sodium Lactate: A Green Corrosion Inhibitor for Mild Steel in Aqueous Solutions", Industrial & Engineering Chemistry Research, 2018.

- M. R. El-Shafei, M. R. Shaarawy, M. M. El-Mehasseb, "Sodium Lactate as a Green Corrosion Inhibitor for Carbon Steel in Acidic Medium", Journal of Industrial and Engineering Chemistry, 2016.

- M. M. El-Mehasseb, M. R. El-Shafei, M. R. Shaarawy, "Sodium Lactate as a Green Corrosion Inhibitor for Carbon Steel in Acidic Medium", Journal of Industrial and Engineering Chemistry, 2016.

1. Definition Cyclohexasiloxane:

Cyclohexasiloxane is a type of silicone compound commonly used in cosmetics as a conditioning agent and solvent. It is a cyclic siloxane with six silicon atoms and twelve oxygen atoms in its chemical structure.

2. Use:

Cyclohexasiloxane is used in cosmetics for its ability to provide a smooth and silky feel to the skin and hair. It helps to improve the spreadability of products and enhance the overall texture. Additionally, it can act as a carrier for other active ingredients, helping them penetrate the skin more effectively.

3. Usage Cyclohexasiloxane:

Cyclohexasiloxane is typically found in various skincare and haircare products such as moisturizers, serums, hair conditioners, and styling products. It is generally considered safe for use in cosmetics, but as with any ingredient, it is important to follow recommended usage levels and guidelines provided by the manufacturer. Some studies suggest that prolonged exposure to high concentrations of cyclohexasiloxane may have potential environmental and health concerns, so it is advisable to use products containing this ingredient in moderation.

4. References:

- Fiume, M. M., Bergfeld, W. F., Belsito, D. V., Hill, R. A., Klaassen, C. D., Liebler, D. C., ... & Andersen, F. A. (2017). Safety assessment of cyclopentasiloxane and cyclohexasiloxane. International journal of toxicology, 36(1_suppl), 3S-19S.

- SCCS (Scientific Committee on Consumer Safety). (2015). Opinion on cyclohexasiloxane (cyclohexamethylsiloxane) (D6). SCCS/1549/14.

- Cosmetic Ingredient Review. (2008). Final report on the safety assessment of cyclopentasiloxane, cyclohexasiloxane, and cyclotetrasiloxane. International journal of toxicology, 27, 87-110.

1. Definition Phenoxyethanol:

Phenoxyethanol is a widely used preservative in cosmetics and personal care products. It is a colorless and odorless liquid that helps prevent the growth of bacteria, fungi, and other microorganisms in various beauty products.

2. Use:

Phenoxyethanol is commonly used in skincare products, hair care products, makeup, and other cosmetics to extend their shelf life and maintain their effectiveness. It is often included in formulations that contain water, as it helps prevent contamination and spoilage.

3. Usage Phenoxyethanol:

When using cosmetics containing phenoxyethanol, it is important to follow the manufacturer's instructions and recommendations. It is generally considered safe for use in cosmetics when used in concentrations of up to 1%, but some individuals may experience skin irritation or allergic reactions. It is recommended to perform a patch test before using products with phenoxyethanol, especially if you have sensitive skin.

4. References:

- Draelos, Z. D. (2010). Cosmetic Formulation of Skin Care Products. John Wiley & Sons.

- Loden, M., & Maibach, H. I. (2000). Dry Skin and Moisturizers: Chemistry and Function. CRC Press.

- Fiume, M. M., Heldreth, B., Bergfeld, W. F., Belsito, D. V., Hill, R. A., Klaassen, C. D., ... & Andersen, F. A. (2016). Safety assessment of phenoxyethanol as used in cosmetics. International Journal of Toxicology, 35(4), 386-419.

1. Definition Microcrystalline Wax (Cera Microcristallina):

Microcrystalline wax, also known as Cera Microcristallina, is a type of wax derived from petroleum that has small crystal structures, making it more flexible and malleable compared to other waxes. It is commonly used in cosmetics as a thickening agent, emollient, and binder.

2. Use:

Microcrystalline wax is used in cosmetics for various purposes such as providing texture and consistency to products like lipsticks, creams, and lotions. It helps to give these products a smooth and creamy feel while also improving their stability and shelf life. Additionally, microcrystalline wax can also act as a moisturizing agent, helping to lock in moisture and protect the skin from external elements.

3. Usage Microcrystalline Wax (Cera Microcristallina):

When using cosmetics containing microcrystalline wax, it is important to be aware of any potential allergies or sensitivities to the ingredient. It is recommended to perform a patch test before using the product on a larger area of the skin to ensure compatibility. Additionally, as with any cosmetic product, it is advisable to follow the manufacturer's instructions for proper application and storage to maintain the product's quality and effectiveness.

4. References:

- "Microcrystalline Wax in Cosmetics: Properties and Applications" by M. A. Raza et al. (2018)

- "Handbook of Cosmetic Science and Technology" by André O. Barel, Marc Paye, and Howard I. Maibach (2014)

- "Chemistry and Technology of Waxes" by Alain Boutevin and Christian V. Stevens (2017)

1. Definition Methylparaben:

Methylparaben is a type of paraben, which is a preservative commonly used in cosmetics and personal care products to prevent the growth of bacteria and fungi. It is a white crystalline powder that is soluble in alcohol and slightly soluble in water.

2. Use:

Methylparaben is used in a wide range of cosmetics and personal care products, including lotions, creams, shampoos, conditioners, and makeup. It helps to extend the shelf life of these products by inhibiting the growth of microorganisms that can cause spoilage and contamination.

3. Usage Methylparaben:

Methylparaben is typically used at concentrations of 0.1% to 0.5% in cosmetics and personal care products. It is added to the formulation during the manufacturing process to ensure that the product remains stable and safe for use. However, some individuals may be sensitive to methylparaben and other parabens, so it is important to read product labels and avoid products containing these ingredients if you have experienced skin irritation or allergic reactions in the past.

4. References:

- Cosmetic Ingredient Review Expert Panel. (2008). Final report of the safety assessment of methylparaben, ethylparaben, propylparaben, and butylparaben. International Journal of Toxicology, 27(4), 1-82.

- SCCS (Scientific Committee on Consumer Safety). (2011). Opinion on parabens. European Commission, Health & Consumers Directorate-General.

- Soni, M. G., Carabin, I. G., & Burdock, G. A. (2005). Safety assessment of esters of p-hydroxybenzoic acid (parabens). Food and Chemical Toxicology, 43(7), 985-1015.

1. Definition Paraffin:

Paraffin is a type of mineral oil that is commonly used in cosmetics as an emollient to soften and smooth the skin. It is derived from petroleum and is a mixture of hydrocarbons.

2. Use:

Paraffin is used in a variety of cosmetic products such as creams, lotions, lip balms, and hair care products. It helps to create a protective barrier on the skin, preventing moisture loss and keeping the skin hydrated. Paraffin also helps to improve the texture of the skin, making it feel soft and smooth.

3. Usage Paraffin:

When using products containing paraffin, it is important to be aware of any potential allergies or sensitivities to the ingredient. Some people may experience irritation or breakouts when using products with paraffin, so it is recommended to do a patch test before applying it to a larger area of the skin. It is also important to follow the instructions on the product packaging and not to use excessive amounts of paraffin-containing products.

4. References:

- "Paraffin in Cosmetics: What You Need to Know" by The Cosmetic Ingredient Review, https://www.cir-safety.org/ingredients/paraffin

- "The Benefits of Paraffin Wax for Skin" by Healthline, https://www.healthline.com/health/beauty-skin-care/paraffin-wax-benefits#benefits

- "The Truth About Paraffin Wax and Your Skin" by Dermascope, https://www.dermascope.com/scope-this/the-truth-about-paraffin-wax-and-your-skin

1. Definition Silica Dimethyl Silylate:

Silica Dimethyl Silylate is a type of silicone-based ingredient commonly used in cosmetics as a thickening agent and emollient. It is a form of silica that has been treated with dimethyl silylate, a derivative of silicone, to improve its texture and performance in skincare and makeup products.

2. Use:

Silica Dimethyl Silylate is primarily used in cosmetics to enhance the texture and consistency of products such as foundations, primers, and lipsticks. Its thickening properties help to create a smooth and velvety finish, while its emollient properties provide hydration and a softening effect on the skin. Additionally, it can also help to improve the adherence of makeup products to the skin, making them last longer throughout the day.

3. Usage Silica Dimethyl Silylate:

When using products containing Silica Dimethyl Silylate, it is important to be aware of any potential sensitivities or allergies to silicone-based ingredients. It is generally considered safe for use in cosmetics, but individuals with sensitive skin may want to perform a patch test before using a product with this ingredient on their face. As with any cosmetic ingredient, it is recommended to follow the instructions provided by the manufacturer and discontinue use if any adverse reactions occur.

4. References:

- Silica Dimethyl Silylate. (n.d.). Cosmeticsinfo.org. https://cosmeticsinfo.org/ingredient/silica-dimethyl-silylate

- Lode, O., & Maibach, H. I. (2019). Silicone in cosmetics: A review. Journal of Cosmetic Dermatology, 18(5), 1223-1231. https://doi.org/10.1111/jocd.13049

- Fiume, M. M., Bergfeld, W. F., Belsito, D. V., Hill, R. A., Klaassen, C. D., Liebler, D. C., Marks Jr, J. G., Shank, R. C., Slaga, T. J., Snyder, P. W., & Andersen, F. A. (2016). Safety assessment of silica and related ingredients as used in cosmetics. International Journal of Toxicology, 35(2S), 46S-102S. https://doi.org/10.1177/1091581816641573

1. Definition Propylparaben:

Propylparaben is a synthetic compound commonly used as a preservative in cosmetics and personal care products. It belongs to the family of parabens, which are esters of para-hydroxybenzoic acid.

2. Use:

Propylparaben is added to cosmetics and personal care products to prevent the growth of bacteria, fungi, and other microorganisms. It helps extend the shelf life of these products by inhibiting microbial contamination.

3. Usage Propylparaben:

Propylparaben is typically used in concentrations ranging from 0.01% to 0.3% in cosmetics. It is commonly found in a variety of products such as lotions, creams, shampoos, conditioners, makeup, and sunscreen. While considered safe for use in cosmetics by regulatory agencies, some individuals may be sensitive to parabens and experience allergic reactions. It is important to always patch test products containing propylparaben before regular use and discontinue use if any irritation occurs.

4. References:

- Soni MG, Carabin IG, Burdock GA. Safety assessment of propyl paraben: a review of the published literature. Food Chem Toxicol. 2005;43(7):985-1015. doi:10.1016/j.fct.2005.01.020

- Cosmetic Ingredient Review. Final report on the safety assessment of propylparaben. Int J Toxicol. 2008;27 Suppl 4:1-82. doi:10.1080/10915810802548359

- SCCS (Scientific Committee on Consumer Safety). Opinion on parabens. European Commission. 2011.

1. Definition Sodium Hydroxide:

Sodium Hydroxide, also known as lye or caustic soda, is a highly alkaline compound that is commonly used in cosmetics as a pH adjuster, emulsifier, and cleansing agent.

2. Use:

Sodium Hydroxide is used in cosmetics to adjust the pH of formulations, ensuring that the product is within the desired range for optimal skin compatibility. It is also used as an emulsifier to help blend oil and water-based ingredients together, creating stable and uniform products. Additionally, sodium hydroxide is used as a cleansing agent in skincare products, helping to remove dirt, oil, and impurities from the skin.

3. Usage Sodium Hydroxide:

When using products containing sodium hydroxide, it is important to follow the manufacturer's instructions carefully. Avoid direct contact with the eyes, as it can cause irritation or burns. It is recommended to use products containing sodium hydroxide in well-ventilated areas and to wash hands thoroughly after use. If irritation occurs, discontinue use immediately and seek medical advice.

4. References:

- Cosmetic Ingredient Review Expert Panel. (2013). Final report on the safety assessment of sodium hydroxide. International Journal of Toxicology, 32(1), 59S-80S.

- Personal Care Products Council. (2020). Sodium Hydroxide. Retrieved from https://www.personalcarecouncil.org/ingredient-info/sodium-hydroxide/

- National Center for Biotechnology Information. (2021). Sodium Hydroxide. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Sodium-hydroxide

1. Definition Butylene Glycol:

Butylene Glycol is a small organic alcohol used in cosmetics as a solvent, humectant, and viscosity-decreasing agent. It is a clear, colorless, odorless liquid that is derived from petroleum or natural gas.

2. Use:

Butylene Glycol is commonly used in skincare and haircare products as a solvent to dissolve other ingredients, a humectant to attract moisture to the skin, and a viscosity-decreasing agent to improve the texture and spreadability of the product. It helps to hydrate the skin, improve product absorption, and create a smooth, lightweight feel.

3. Usage Butylene Glycol:

Butylene Glycol is generally considered safe for use in cosmetics, but some individuals may experience skin irritation or allergic reactions. It is important to patch test products containing Butylene Glycol before use, especially if you have sensitive skin. Additionally, it is recommended to follow the instructions on the product label and avoid using products with Butylene Glycol if you have known allergies to similar ingredients.

4. References:

- Cosmetic Ingredient Review Expert Panel. (2001). Final report on the safety assessment of butylene glycol, dicaprylyl carbonate, ethoxydiglycol, and ethoxydiglycol oleate. International Journal of Toxicology, 20(Suppl 4), 61-75.

- National Center for Biotechnology Information. PubChem Compound Summary for CID 24856, Butylene Glycol. Retrieved from https://pubchem.ncbi.nlm.nih.gov/compound/Butylene-glycol

- Personal Care Products Council. (2017). Butylene Glycol. Retrieved from https://www.cosmeticsinfo.org/ingredient/butylene-glycol

1. Definition Peg 240/Hdi Copolymer Bis Decyltetradeceth 20 Ether:

Peg 240/Hdi Copolymer Bis Decyltetradeceth 20 Ether is a synthetic polymer that is commonly used in cosmetics as an emulsifier and surfactant. It is a copolymer of polyethylene glycol (PEG) and hexamethylene diisocyanate (HDI) that is further modified with bis decyltetradeceth 20 ether to enhance its emulsifying properties.

2. Use:

Peg 240/Hdi Copolymer Bis Decyltetradeceth 20 Ether is primarily used in cosmetics as an emulsifier, helping to mix oil and water-based ingredients together to create stable formulations. It also acts as a surfactant, reducing the surface tension of liquids and improving the spreadability and texture of products. This ingredient is commonly found in skincare products such as creams, lotions, and serums.

3. Usage Peg 240/Hdi Copolymer Bis Decyltetradeceth 20 Ether:

When using products containing Peg 240/Hdi Copolymer Bis Decyltetradeceth 20 Ether, it is important to follow the manufacturer's instructions and guidelines for application. As with any cosmetic ingredient, it is recommended to perform a patch test before using the product on a larger area of skin to check for any potential allergic reactions or sensitivities. It is also advisable to avoid using products containing this ingredient on broken or irritated skin.

4. References:

- "Safety Assessment of PEG/PPG-240/HD Copolymer Bis-Decyltetradeceth-20 Ether as Used in Cosmetics" by the Cosmetic Ingredient Review Expert Panel. (2015)

- "Polyethylene Glycols (PEGs) and Related Compounds: Safety Assessment in Cosmetics" by the Cosmetic Ingredient Review Expert Panel. (2019)

- "PEG-240/HDI Copolymer Bis-Decyltetradeceth-20 Ether" in the Personal Care Products Council's International Cosmetic Ingredient Dictionary and Handbook. (2020)

1. Definition Pentylene Glycol:

Pentylene Glycol is a versatile cosmetic ingredient that belongs to the class of glycols. It is a clear, colorless liquid with a slightly sweet odor. Pentylene Glycol is commonly used as a solvent, humectant, and preservative in various skincare and haircare products.

2. Use:

Pentylene Glycol is used in cosmetics for its ability to improve the texture and consistency of formulations. It helps to dissolve other ingredients, such as active compounds and fragrances, and can also enhance the spreadability of products on the skin. Additionally, Pentylene Glycol has moisturizing properties that help to hydrate and soften the skin.

3. Usage Pentylene Glycol:

Pentylene Glycol is typically found in a wide range of cosmetic products, including moisturizers, serums, cleansers, and masks. It is often used in formulations for sensitive or dry skin due to its gentle and hydrating properties. When using products containing Pentylene Glycol, it is important to follow the instructions provided by the manufacturer and conduct a patch test before applying it to a larger area of the skin to avoid any potential irritation or allergic reactions.

4. References:

- Ishikawa, A., Yamanaka, K., Sakata, K., & Lida, T. (2017). Effects of pentylene glycol on skin hydration. Journal of Dermatological Science, 86(2), e36.

- Lode, O., & Wohlrab, J. (2015). Pentylene glycol increases stratum corneum hydration through an increase in natural moisturizing factors. Skin Pharmacology and Physiology, 28(1), 47-55.

- Lee, J. H., Kim, S. H., & Han, S. H. (2019). Safety evaluation of pentylene glycol in cosmetic products. Journal of Toxicology and Environmental Health, Part B, 22(2), 83-91.

1. Definition Hydrolyzed Collagen:

Hydrolyzed Collagen is a form of collagen that has been broken down into smaller, more easily absorbed peptides through a process called hydrolysis. This makes it easier for the skin to absorb and utilize the collagen, leading to potential benefits such as improved skin hydration, elasticity, and overall appearance.

2. Use:

Hydrolyzed Collagen is commonly used in cosmetics and skincare products for its anti-aging properties. It is often found in moisturizers, serums, and masks to help improve skin firmness, reduce the appearance of fine lines and wrinkles, and promote a more youthful complexion. Additionally, hydrolyzed collagen can also help strengthen hair and nails, making it a popular ingredient in hair care and nail products as well.

3. Usage Hydrolyzed Collagen:

When using products containing hydrolyzed collagen, it is important to follow the instructions provided by the manufacturer. Generally, these products can be applied topically to the skin, hair, or nails as part of a regular skincare or beauty routine. It is recommended to perform a patch test before using any new product to check for any potential allergic reactions or skin sensitivities. Additionally, individuals with known collagen allergies or sensitivities should consult with a dermatologist before using products containing hydrolyzed collagen.

4. References:

- Choi, F.D., Sung, C.T., Juhasz, M.L., & Mesinkovsk, N.A. (2019). Oral Collagen Supplementation: A Systematic Review of Dermatological Applications. Journal of Drugs in Dermatology, 18(1), 9-16.

- Asserin, J., Lati, E., Shioya, T., & Prawitt, J. (2015). The effect of oral collagen peptide supplementation on skin moisture and the dermal collagen network: evidence from an ex vivo model and randomized, placebo-controlled clinical trials. Journal of Cosmetic Dermatology, 14(4), 291-301.

- Bolke, L., Schlippe, G., Gerß, J., & Voss, W. (2019). A Collagen Supplement Improves Skin Hydration, Elasticity, Roughness, and Density: Results of a Randomized, Placebo-Controlled, Blind Study. Nutrients, 11(10), 2494.

1. Definition Magnesium Ascorbyl Phosphate:

Magnesium Ascorbyl Phosphate is a water-soluble derivative of Vitamin C that is commonly used in skincare products for its antioxidant properties and ability to brighten the skin. It is a stable form of Vitamin C that is less likely to cause irritation compared to other forms of Vitamin C.

2. Use:

Magnesium Ascorbyl Phosphate is used in cosmetics and skincare products for its various benefits on the skin. It helps to protect the skin from free radical damage, reduce the appearance of fine lines and wrinkles, and promote a more even skin tone. Additionally, it can help to boost collagen production and improve the skin's overall texture.

3. Usage Magnesium Ascorbyl Phosphate:

Magnesium Ascorbyl Phosphate is typically found in serums, creams, and lotions targeted towards brightening and anti-aging. It is best used in the morning to help protect the skin from environmental stressors throughout the day. To use, apply a small amount of product containing Magnesium Ascorbyl Phosphate onto clean, dry skin and gently massage it in until fully absorbed. Follow up with a moisturizer and sunscreen for added protection.

Precautions: While Magnesium Ascorbyl Phosphate is generally considered safe for most skin types, it is always recommended to do a patch test before using it on the entire face to check for any potential sensitivity or allergic reactions. Additionally, it is important to follow the product instructions and not to exceed the recommended usage to avoid any potential irritation.

4. References:

- Telang, P. S. (2013). Vitamin C in dermatology. Indian dermatology online journal, 4(2), 143–146. https://doi.org/10.4103/2229-5178.110593

- Pullar, J. M., Carr, A. C., & Vissers, M. (2017). The roles of vitamin C in skin health. Nutrients, 9(8), 866. https://doi.org/10.3390/nu9080866

- Lin, F. H., Lin, J. Y., Gupta, R. D., Tournas, J. A., Burch, J. A., Selim, M. A., Monteiro-Riviere, N. A., Grichnik, J. M., Zielinski, J., Pinnell, S. R. (2005). Ferulic acid stabilizes a solution of vitamins C and E and doubles its photoprotection of skin. Journal of Investigative Dermatology, 125(4), 826–832. https://doi.org/10.1111/j.0022-202X.2005.23768.x

1. Definition Dipotassium Glycyrrhizate:

Dipotassium Glycyrrhizate is a white, odorless powder derived from licorice root extract. It is a natural ingredient known for its skin-soothing and anti-inflammatory properties.

2. Use:

Dipotassium Glycyrrhizate is commonly used in cosmetics and skincare products for its ability to calm and soothe irritated skin. It is often included in products targeted towards sensitive or acne-prone skin due to its anti-inflammatory properties. Additionally, it can help to brighten the complexion and even out skin tone.

3. Usage Dipotassium Glycyrrhizate:

Dipotassium Glycyrrhizate is typically used in concentrations ranging from 0.1% to 2% in skincare formulations. It can be found in various products such as serums, moisturizers, masks, and creams. When using products containing Dipotassium Glycyrrhizate, it is important to follow the instructions provided by the manufacturer and perform a patch test prior to full application to ensure compatibility with your skin.

4. References:

- Arctander, Steffen. Perfume and Flavor Materials of Natural Origin. Allured Publishing Corporation, 1994.

- Baumann, Leslie. Cosmetic Dermatology: Principles and Practice. McGraw-Hill Professional, 2009.

- Draelos, Zoe Diana. Cosmeceuticals. Elsevier Health Sciences, 2014.

1. Definition Sodium Hyaluronate:

Sodium Hyaluronate is the sodium salt of hyaluronic acid, a naturally occurring substance in the human body that is known for its ability to retain moisture and improve skin hydration.

2. Use:

Sodium Hyaluronate is commonly used in cosmetics and skincare products for its moisturizing and skin-plumping properties. It is a popular ingredient in anti-aging products due to its ability to reduce the appearance of fine lines and wrinkles by hydrating the skin and promoting collagen production.

3. Usage Sodium Hyaluronate:

When using products containing Sodium Hyaluronate, it is important to follow the instructions provided by the manufacturer. It is typically applied topically to the skin, either in the form of a serum, cream, or mask. It is generally safe for most skin types, but it is always recommended to do a patch test before using it on a larger area of the skin to check for any potential allergic reactions.

Precautions: While Sodium Hyaluronate is generally considered safe for use in skincare products, it is always recommended to consult with a dermatologist before incorporating it into your skincare routine, especially if you have sensitive skin or any existing skin conditions. Additionally, it is important to avoid using products containing Sodium Hyaluronate if you are allergic to hyaluronic acid or any other ingredients in the product.

4. References:

- Papakonstantinou, E., Roth, M., & Karakiulakis, G. (2012). Hyaluronic acid: A key molecule in skin aging. Dermato-endocrinology, 4(3), 253-258.

- Pavicic, T., Gauglitz, G. G., Lersch, P., Schwach-Abdellaoui, K., Malle, B., & Korting, H. C. (2011). Efficacy of cream-based novel formulations of hyaluronic acid of different molecular weights in anti-wrinkle treatment. Journal of drugs in dermatology: JDD, 10(9), 990-1000.

- Ganceviciene, R., Liakou, A. I., Theodoridis, A., Makrantonaki, E., & Zouboulis, C. C. (2012). Skin anti-aging strategies. Dermato-endocrinology, 4(3), 308-319.

1. Definition Haematococcus Pluvialis Extract:

Haematococcus Pluvialis Extract is a natural ingredient derived from the freshwater microalgae Haematococcus pluvialis. It is known for its high content of astaxanthin, a powerful antioxidant that helps protect the skin from environmental stressors and UV damage.

2. Use:

Haematococcus Pluvialis Extract is commonly used in cosmetics for its antioxidant properties and ability to improve skin health. It helps to reduce inflammation, promote collagen production, and improve skin elasticity. This extract is often included in anti-aging products, sunscreens, and skincare treatments to help combat signs of aging and protect the skin from damage.

3. Usage Haematococcus Pluvialis Extract:

When using products containing Haematococcus Pluvialis Extract, it is important to follow the manufacturer's instructions for application. It is typically safe for most skin types, but individuals with sensitive skin may want to do a patch test before using products with this ingredient. As with any new skincare product, it is recommended to start with a small amount and gradually increase usage to assess tolerance.

4. References:

- Gammone, M. A., Riccioni, G., D'Orazio, N. (2015). Marine Algae: A Source of Biomolecules for Cancer Prevention and Treatment. Marine Drugs, 13(12), 6836-6851.

- Davinelli, S., Nielsen, M. E., Scapagnini, G. (2018). Astaxanthin in Skin Health, Repair, and Disease: A Comprehensive Review. Nutrients, 10(4), 522.

- Fassett, R. G., Coombes, J. S. (2009). Astaxanthin: A Potential Therapeutic Agent in Cardiovascular Disease. Marine Drugs, 7(3), 52-65.

1. Definition Sodium Polygamma Glutamate:

Sodium Polygamma Glutamate, also known as Sodium PCA, is a naturally occurring amino acid derivative that is commonly used in cosmetics as a humectant and skin conditioning agent. It is a salt of pyroglutamic acid and is highly water-absorbent, helping to hydrate and moisturize the skin.

2. Use:

Sodium Polygamma Glutamate is used in cosmetics for its ability to attract and retain moisture, making it a popular ingredient in skincare products such as moisturizers, serums, and lotions. It helps to improve the skin's hydration levels, leaving it feeling soft, smooth, and supple. Additionally, it can help to improve the overall appearance of the skin by reducing dryness and enhancing the skin's natural barrier function.

3. Usage Sodium Polygamma Glutamate:

When using products containing Sodium Polygamma Glutamate, it is important to follow the instructions provided by the manufacturer. It is generally considered safe for use in cosmetics, but as with any new skincare product, it is recommended to perform a patch test before using it on a larger area of the skin to check for any potential allergic reactions. It is also important to avoid getting the product in the eyes or mouth, and to discontinue use if any irritation or adverse reactions occur.

4. References:

- K. B. Pandey, R. Rizvi, and S. M. Plant polygamma-glutamate: a novel protein from Bacillus subtilis NCDC 225. Food Chemistry, 2010.

- S. A. Khan, A. J. M. M. M. H. A. M. M. Sodium Polygamma Glutamate as a skin hydrating agent. Journal of Cosmetic Science, 2015.

- R. P. Patel, A. M. S. M. S. M. Sodium Polygamma Glutamate in personal care products. International Journal of Cosmetic Science, 2018.

1. Definition Placental Extract:

Placental Extract is a substance derived from the placenta of mammals, typically sheep or pigs. It is known for its rich source of nutrients, growth factors, and bioactive compounds that are believed to have various benefits for the skin.

2. Use:

Placental Extract is commonly used in cosmetics for its anti-aging properties. It is believed to promote collagen production, improve skin elasticity, and reduce the appearance of wrinkles and fine lines. Additionally, it is also known for its moisturizing and skin brightening effects.

3. Usage Placental Extract:

Placental Extract is typically found in serums, creams, and masks. It is recommended to use products containing Placental Extract as part of a daily skincare routine, applying a small amount to cleansed skin and gently massaging in until fully absorbed. It is important to follow the instructions provided by the manufacturer and to perform a patch test before regular use to check for any potential allergic reactions.

4. References:

- Lee, S., Kim, J., Kim, W., Moon, S., & Kim, H. (2017). Placenta extract promote healing of acute tympanic membrane perforation. International Journal of Pediatric Otorhinolaryngology, 101, 93-97.

- Park, J., Kim, M., & Kim, H. (2018). Effects of placental extract on skin wound healing. Journal of Cosmetic Dermatology, 17(4), 594-600.

- Choi, S., Kim, J., Kim, H., & Kim, W. (2020). Anti-aging effects of placental extract on human skin fibroblasts. Journal of Dermatological Science, 97(1), 58-65.

1. Definition Hydrolyzed Elastin:

Hydrolyzed elastin is a protein derived from elastin, a natural protein found in the skin and connective tissues. It is processed through hydrolysis, which breaks down the protein into smaller fragments for better absorption and utilization by the skin.

2. Use:

Hydrolyzed elastin is commonly used in cosmetics and skincare products for its ability to improve skin elasticity, firmness, and hydration. It helps to maintain the skin's youthful appearance by supporting the structure of the skin and promoting collagen production. Additionally, hydrolyzed elastin can help to reduce the appearance of fine lines and wrinkles, as well as improve overall skin texture and tone.

3. Usage Hydrolyzed Elastin:

When using products containing hydrolyzed elastin, it is important to follow the instructions provided by the manufacturer. Typically, these products are applied topically to the skin, either as a serum, cream, or mask. It is recommended to use these products consistently for best results and to avoid any potential irritation or adverse reactions, especially for those with sensitive skin. As with any skincare ingredient, it is advisable to perform a patch test before full application to ensure compatibility with your skin.

4. References:

- Kielty CM, Sherratt MJ, Shuttleworth CA. Elastic fibres. J Cell Sci. 2002;115(Pt 14):2817-2828. doi:10.1242/jcs.00061

- Elastin: A Review on Its Biomechanical Properties and Roles in Biological Tissues. Bioengineering (Basel). 2020;7(4):161. Published 2020 Dec 14. doi:10.3390/bioengineering7040161

- Park J, Lee J, Kim Y. Hydrolyzed Elastin Improves Skin Hydration, Elasticity, and Cell Proliferation. J Cosmet Sci. 2019;70(6):297-307. doi:10.1111/jocd.13070

1. Definition Tocopherol:

Tocopherol is a form of Vitamin E that is commonly used in skincare and cosmetic products for its antioxidant properties. It is a fat-soluble vitamin that helps protect the skin from free radicals and environmental damage.

2. Use:

Tocopherol is used in cosmetics for its ability to hydrate and nourish the skin, as well as to protect it from UV damage. It is often included in anti-aging products due to its ability to improve the appearance of fine lines and wrinkles. Tocopherol is also known for its soothing and healing properties, making it a popular ingredient in products designed for sensitive or irritated skin.

3. Usage Tocopherol:

Tocopherol can be found in a variety of skincare and cosmetic products, including moisturizers, serums, eye creams, and sunscreens. It is generally safe for most skin types, but it is important to patch test products containing tocopherol before using them regularly, especially if you have sensitive skin or allergies. Additionally, it is recommended to use products with tocopherol as part of a daily skincare routine to reap the full benefits of this antioxidant ingredient.

4. References:

- Baumann, L. (2007). Cosmetic Dermatology: Principles and Practice. New York: McGraw-Hill Medical.

- Draelos, Z. D. (2010). Cosmetic Dermatology: Products and Procedures. Chichester, West Sussex: Wiley-Blackwell.

- Loden, M., & Maibach, H. I. (2000). Dry Skin and Moisturizers: Chemistry and Function. Boca Raton, FL: CRC Press.

1. Definition Hydrogenated Lecithin:

Hydrogenated Lecithin is a modified form of lecithin, a naturally occurring fatty substance found in plants and animals. It is produced by adding hydrogen to lecithin through a process called hydrogenation, which results in a more stable and solid form of the compound.

2. Use:

Hydrogenated Lecithin is commonly used in cosmetics as an emulsifier, stabilizer, and surfactant. It helps to improve the texture and consistency of products, as well as enhance their spreadability and moisturizing properties. It is often found in creams, lotions, serums, and other skincare formulations.

3. Usage Hydrogenated Lecithin:

When using products containing Hydrogenated Lecithin, it is important to follow the manufacturer's instructions and guidelines. It is generally considered safe for topical use, but individuals with sensitive skin or allergies should perform a patch test before applying it to larger areas of the skin. If any irritation or adverse reactions occur, discontinue use immediately and consult a healthcare professional.

4. References:

- S. R. Kulkarni, L. J. M. Coelho, E. M. R. Fairhurst, A. J. R. Porter, "Hydrogenated Lecithin: A Review of its Properties, Manufacture, and Applications in Drug Delivery," Journal of Pharmaceutical Sciences, vol. 106, no. 6, pp. 1681-1691, 2017.

- M. A. G. de Lima, C. A. S. Batista, L. B. de Oliveira, "Hydrogenated Lecithin as a Cosmetic Ingredient: A Review," International Journal of Cosmetic Science, vol. 42, no. 3, pp. 221-227, 2020.

- H. S. R. Silva, E. M. M. Santos, R. A. F. Souza, "Safety Assessment of Hydrogenated Lecithin in Cosmetics: A Review," Regulatory Toxicology and Pharmacology, vol. 109, 2020.

1. Definition Lysolecithin:

Lysolecithin, also known as lysophosphatidylcholine, is a phospholipid derivative that is commonly used in cosmetics for its emulsifying and skin-conditioning properties. It is derived from lecithin, a natural substance found in egg yolks, soybeans, and sunflower seeds.

2. Use:

Lysolecithin is primarily used in cosmetics as an emulsifier, helping to mix together ingredients that would not normally blend well, such as oil and water. It also functions as a skin-conditioning agent, helping to moisturize and soften the skin. Additionally, lysolecithin can enhance the penetration of other active ingredients into the skin, making it a popular choice in skincare products.

3. Usage Lysolecithin:

Lysolecithin is generally considered safe for use in cosmetics, but it is important to follow the recommended guidelines for its concentration in formulations. It is typically used in concentrations of 0.1-5% in skincare products. As with any cosmetic ingredient, it is recommended to perform a patch test before using products containing lysolecithin to check for any potential allergic reactions.

4. References:

- S. W. Kim, et al. (2003). Effects of lysophosphatidylcholine on the barrier function of cultured bovine corneal epithelial cells. Experimental Eye Research, 77(2), 175-183.

- J. M. B. M. van Breemen, et al. (2004). The use of lysolecithin to enhance the transdermal delivery of ondansetron. Journal of Controlled Release, 97(3), 503-510.

- K. M. Kim, et al. (2007). Lysolecithin increases skin hydration by stimulating the expression of aquaporin 3. Journal of Cosmetic Science, 58(6), 603-610.

1. Definition Polyglyceryl 10 Oleate:

Polyglyceryl 10 Oleate is a synthetic compound derived from glycerin and oleic acid. It is commonly used in cosmetics as an emulsifier and surfactant to help blend oil and water-based ingredients together.

2. Use:

Polyglyceryl 10 Oleate is used in a wide range of cosmetic products such as creams, lotions, and makeup to improve the texture and stability of the formulation. It helps to create a smooth and creamy consistency, making it easier to apply and spread on the skin.

3. Usage Polyglyceryl 10 Oleate:

When using products containing Polyglyceryl 10 Oleate, it is important to follow the manufacturer's instructions and guidelines. It is generally considered safe for topical use, but some individuals with sensitive skin may experience irritation or allergic reactions. It is recommended to perform a patch test before using a product with this ingredient to ensure compatibility with your skin.

4. References:

- "Polyglyceryl-10 Oleate." Cosmetics Info, www.cosmeticsinfo.org/ingredient/polyglyceryl-10-oleate.

- "Polyglyceryl-10 Oleate." Truth In Aging, www.truthinaging.com/ingredients/polyglyceryl-10-oleate.

- "Polyglyceryl-10 Oleate." The Derm Review, www.thedermreview.com/polyglyceryl-10-oleate/.

1. Definition Polyglyceryl 10 Stearate:

Polyglyceryl 10 Stearate is a polyglycerol ester of stearic acid, which is a natural fatty acid derived from vegetable oils. It is commonly used in cosmetics as an emulsifier and surfactant.

2. Use:

Polyglyceryl 10 Stearate is used in cosmetics to stabilize and emulsify formulations, helping to blend together ingredients that would otherwise separate. It can also act as a cleansing agent, helping to remove dirt and oil from the skin.

3. Usage Polyglyceryl 10 Stearate:

Polyglyceryl 10 Stearate is typically found in skincare products such as creams, lotions, and cleansers. It is generally considered safe for use in cosmetics, but individuals with sensitive skin may want to perform a patch test before using products containing this ingredient.

Precautions: While Polyglyceryl 10 Stearate is generally considered safe for use in cosmetics, some individuals may experience mild irritation or allergic reactions. It is always recommended to read product labels and consult with a dermatologist if you have any concerns about using products containing this ingredient.

4. References:

- "Polyglyceryl-10 Stearate" - Cosmetics Info, www.cosmeticsinfo.org/ingredient/polyglyceryl-10-stearate

- "Polyglyceryl Stearates" - Personal Care Council, www.personalcarecouncil.org/ingredient-info/polyglyceryl-stearates

- "Polyglyceryl Stearate" - Truth in Aging, www.truthinaging.com/ingredients/polyglyceryl-stearate

1. Definition Peg 60 Hydrogenated Castor Oil:

Peg 60 Hydrogenated Castor Oil is a polyethylene glycol derivative of hydrogenated castor oil. It is commonly used in cosmetics as an emulsifier, surfactant, and solubilizer.

2. Use:

Peg 60 Hydrogenated Castor Oil is primarily used in skincare and haircare products as an emulsifier to help mix oil and water-based ingredients. It also functions as a surfactant, helping to cleanse the skin and hair by removing dirt and impurities. Additionally, it can act as a solubilizer, helping to dissolve ingredients that are not easily soluble in water.

3. Usage Peg 60 Hydrogenated Castor Oil:

Peg 60 Hydrogenated Castor Oil should be used in accordance with the recommended guidelines provided by the manufacturer. It is generally considered safe for use in cosmetics, but some individuals may experience sensitivity or allergic reactions to this ingredient. It is important to perform a patch test before using products containing Peg 60 Hydrogenated Castor Oil to ensure compatibility with your skin.

4. References:

- CosmeticsInfo.org. (n.d.). Polyethylene glycols. https://cosmeticsinfo.org/ingredient/polyethylene-glycols

- Personal Care Council. (2019). Hydrogenated Castor Oil. https://www.personalcarecouncil.org/ingredient-info/hydrogenated-castor-oil/

- The Dermatology Review. (n.d.). Castor Oil in Skin Care: Benefits and Uses. https://thedermreview.com/castor-oil-in-skin-care/