Biotin – Uses, Benefits, Sources and Dosage Biotin is known as ‘beauty vitamin’ because of its beneficial effects on nails, hair and skin. Biotin is the vitamin H which is the part of B complex group of vitamins. Our body needs biotin to metabolize fats, carbohydrates and amino acids. Biotin is found in various cosmetic products for hair and nails as it helps to strength the hair and nails. Biotin is also water soluble like all other vitamin B. Bacteria