NatrolNatrolite of Biotin 1000mcg is excellent for those who are balding, want to grow their hair quickly or improve the thickness and fullness of their hair. Amazingly, Biotin also helps give your skin a beautiful glow and adds that lovely sheen to your nails. . . Biotin 1000 Mcg by Natrol 100 Tablet Biotin 1000 Mcg 100 Tablet Biotin is an important B-vitamin that provides dietary support for healthy hair and nails as well as energy production. By supporting the matrix of hair and nails Biotin promotes shiny lustrous hair and strong resilient nails.