Strengthen brittle nails and promote healthy nailsBiotin is a water-soluble B vitamin involved in nutrient metabolism and the synthesis of proteins like keratin found in the hair, skin, and nails. Extra Strength Biotin 10,000 mcg from Webber Naturals can help strengthen fragile or brittle nails and thinning hair, and may help improve dry skin. As part of the B vitamin group, biotin is best known for supporting energy metabolism through its involvement in several enzyme pathways. Biotin acts as an essential cofactor for certain enzymes needed for maintaining optimal energy levels and synthesizing protein building blocks.Extra Strength Biotin 10,000 mcg from Webber Naturals is a convenient, one-per-day vegetarian formula that can help support energy metabolism and the health of hair, nails, and skin.