The use of sericin … leads to an increase in hydration, elasticity, cleaning with less irritation, and antiaging and antiwrinkle effects. These applications are especially due to the presence of amino acids with hydrophilic side groups (80%), such as serine (30 to 33%), which has large capacity to absorb water. The sericin may also form a soft and smooth film on the surface of the skin, preventing the loss of water.

Review Article:
Silkworm Sericin: Properties and Biomedical Applications
Regina Inês Kunz,1 Rose Meire Costa Brancalhão,2 Lucinéia de Fátima ChaskoRibeiro,2 and Maria Raquel Marçal Natali1