Natrol Biotin 10,000mcg Fast Dissolve is a high potency formula that provides dietary support for healthy hair and nails, as well as endergy production, in a delicious, fast-dissolving tablet. By supporting the matrix of hair and nails, Biotin may help promote shiny, lustrous hair and strong, resilient nails. Biotin assists in energy production by helping convert carbohydrates, proteins and fats we consume from our diets into energy for our cells. Healthy Hair & Strong Nails. Supports Cellular Energy Production With Rapid Dissolve Technology Delicious Strawberry Flavor 100% Vegetarian.