Formula 50 is the original protein formula for support of hair and nails. This tried and true formula has been changing the way women look for 50 years. Formula 50 contains protein and vitamin B-6 to support healthy hair and strong, shiny nails. The unique blend of natural amino acids nourishes and replenishes the nutrients most commonly lacking in a woman’s diet that can cause brittle, splitting, peeling nails and thinning hair.Protein and vitamins are needed for healthy hair and nails. Proteins are the building unit while Vitamin B6 is used for protection of peripheral nerves by enhancing proteins synthesis.