ADVANCED SUPPORT FOR STRONGER HAIR AND HEALTHIER NAILS—POWERED BY PROVEN SCIENCE. Biosil Advanced Hair & Nail Care supercharges our patented ch-OSA® collagen generator with the proven beauty benefits of Biotin. This vegan-friendly, science-backed formula goes beyond surface-level solutions—helping your body build its own collagen while strengthening the keratin structure essential for thick, vibrant hair and resilient nails.