Biotin

Biotin, also known as Vitamin B7 or Vitamin H, is a water-soluble B-complex vitamin that serves as an essential cofactor for carboxylase enzymes involved in fatty acid synthesis and amino acid metabolism. In cosmetic formulations, particularly hair care products, biotin is valued for its role in keratin infrastructure, as it supports the production of keratin protein that forms the structural foundation of hair, skin, and nails. Formulators choose USP grade biotin for its high purity and stability in aqueous systems, though its actual penetration to active follicles when applied topically remains a subject of ongoing research, with most clinical evidence supporting oral supplementation for deficiency-related hair issues.