Biotin, also known as Vitamin B7, is a water-soluble B-complex vitamin that plays a key role in converting food into energy and supporting keratin production. Since keratin is a fundamental protein in hair, skin, and nails, biotin is often marketed as a go-to supplement for hair growth. But does it https://oncedirectory.com/listings13152505/biotin-supplements-for-hair-growth-do-they-really-work