Chitin

1. Definition Chitin:

Chitin is a natural polymer that is found in the exoskeletons of crustaceans, insects, and fungi. It is a fibrous substance that is similar in structure to cellulose and is known for its moisturizing and protective properties.

2. Use:

Chitin is commonly used in cosmetics for its ability to hydrate and protect the skin. It is often included in moisturizers, serums, and masks to help improve the skin's moisture barrier and promote a healthy complexion. Chitin is also known for its anti-inflammatory and antioxidant properties, making it a popular ingredient in products designed to soothe and calm irritated skin.

3. Usage Chitin:

When using cosmetics containing chitin, it is important to follow the instructions provided by the manufacturer. It is generally safe for most skin types, but individuals with allergies to shellfish may want to avoid products containing chitin. It is also recommended to perform a patch test before using a new product to ensure that it does not cause any adverse reactions.

4. References:

- Muzzarelli, R. A. A. (2011). Chitin. John Wiley & Sons.

- Aranaz, I., Acosta, N., Civera, C., & Elorza, B. (2014). Cosmetics and cosmeceutical applications of chitin, chitosan and their derivatives. Polymers, 6(1), 133-151.

- Rinaudo, M. (2006). Chitin and chitosan: Properties and applications. Progress in Polymer Science, 31(7), 603-632.