Nourishes Hair, Skin and Nails Vitamin Supplement Get glowing! Often called "the beauty nutrient" because of the nourishment it delivers for healthy hair and scalp, this member of the B-vitamin complex is a key cofactor of enzymes involved in fatty acid metabolism, helping to supply cells with energy. Swanson Premium Biotin delivers 5,000 mcg (5 mg) of D-biotin, the naturally occurring, biologically active form. One reviewer states that Swanson Premium is the best biotin brand because of its small pill size compared to other brands.   Supplement Facts Serving Size: 1 Capsule Amount Per Serving %Daily Value Biotin 5,000 mcg  16,667% ...