Biotin (Vitamin B7) Pure Powder 4oz (113g)Biotin, also called B7, is part of the family of B vitamins. The vitamin is crucial for metabolism regulation and function of the nervous system. The nutrient is also essential for healthy hair, skin, and nails. Biotin Biotin (Vitamin B7) Pure Powder 4oz (113g) $149.99 Add to cart Quick View