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Silk extract is rich in amino acids, which help protect the skin from environmental damage and enhance the elasticity of your skin. The bioactive proteins found in silk extract increase cellular activity in epidermal cells and collagen-producing dermal fibroblasts. Furthermore, silk extract helps promote wound healing in skin cells. Among its many benefits, silk extract is used in a variety of cosmetics, including facial creams and masks, body lotion, shampoo, and bath gel.