Biomimetic Keratin: acts on damaged areas of the hair, that is, where there are structural deficiencies, rebuilding them. Collagen: A protein that helps protect bulb stem cells from free radical damage. Biotin: essential vitamin for hair, nail and skin care, it contributes to high cell renewal by stimulating keratin production. HOW TO USE Take a small amount of product and apply to wet hair. Leave it on for 5 to 10 minutes and rinse thoroughly with warm water.