Cn Clinical Nutrition Hair Care Collagen is a nutritional supplement containing collagen designed to improve the health and appearance of hair. Collagen is an essential protein for hair structure and strength, so this product can help strengthen hair, prevent hair loss and promote healthy hair growth. In addition, collagen may also benefit joints and bones, as it is an important component of connective tissues. This product is used as a dietary supplement to improve hair health and promote healthy joints and bones.