Since 1947 Free Form Skin & Tissue Protection Gluten, Wheat & Dairy Free Suitable for Vegetarians Kosher Parve Dietary Supplement L-Lysine is an essential amino acid that supports the growth, maintenance and health of skin tissue. It promotes the integrity of skin and lips, and is used by the body to produce collagen. This formulation provides Free Form L-Lysine to promote optimal absorption and assimilation.