Biotin is a water-soluble B vitamin, also called vitamin B7 and formerly known as vitamin H or coenzyme R. It is involved in a wide range of metabolic processes, both in humans and in other organisms, primarily related to the utilization of fats, carbohydrates, and amino acids. Biotin is an active ingredient for use in cosmetics for the hair, skin and nails. It helps prevent the peroxidation of body fats. It is an effective moisturizing agent and improves elasticity of the skin. It has synergistic action with Vitamin C and has antioxidant properties.