c

1. Definition c:

C is a common ingredient found in cosmetics, also known as ascorbic acid or vitamin C. It is a powerful antioxidant that helps to brighten the skin, reduce the appearance of fine lines and wrinkles, and protect against environmental damage.

2. Use:

C is commonly used in skincare products such as serums, creams, and masks to improve the overall appearance and health of the skin. It is known for its ability to promote collagen production, which can help to firm and plump the skin, as well as reduce hyperpigmentation and dark spots.

3. Usage c:

When using products containing C, it is important to follow the instructions provided by the manufacturer. Typically, C should be applied to clean, dry skin in the morning before applying sunscreen and other skincare products. It is important to allow the product to fully absorb into the skin before applying additional products, and to avoid using C products in conjunction with products that contain retinol or exfoliating acids, as this can cause irritation.

Precautions: While C is generally safe for most skin types, some individuals may experience irritation or sensitivity when using products containing this ingredient. It is recommended to perform a patch test before using C products on the face, especially if you have sensitive skin. Additionally, it is important to store C products in a cool, dark place to prevent oxidation, which can reduce the effectiveness of the ingredient.

4. References:

- Telang, P. (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. C. M. (2017). The roles of vitamin C in skin health. Nutrients, 9(8), 866. https://doi.org/10.3390/nu9080866

- Al-Niaimi, F., & Chiang, N. Y. Z. (2017). Topical vitamin C and the skin: Mechanisms of action and clinical applications. The Journal of clinical and aesthetic dermatology, 10(7), 14–17.