DaVinci Laboratories Biotin is a dietary supplement that provides support for skin and hair health as well as intestinal flora functions. Biotin is a water soluble B vitamin that supports fat, carbohydrate and protein metabolism. It is also an important component of several enzymes and is involved in energy metabolism. Biotin is suitable for both men and women to support skin, nail and hair health. Recommended usage: As a dietary supplement, take 2 tablets daily with a meal, or as directed by your healthcare practitioner.