Hair to Stay contains a proprietary blend of proteins, vitamins, and nutrients, formulated to work together for maximum benefit on hair growth. Collagen hydrolysate is a protein derived from fish known to build connective tissue in hair, skin, and nails. Horsetail herb extract comes from a plant similar to the fern and has antioxidants beneficial for hair growth. MSM, or organic sulfur, is also crucial for the creation of keratin, the building block of hair. In addition, Hair to Stay is fortified with several B vitamins including biotin, long known to be important for healthy hair. The additional Vitamins A, C, D, and Calcium help balance the formula to achieve the greatest effect.