Jarrow Formulas^® BeautySil^® Hair & Nails formula specifically focuses on 3 nutrients to support the structure and health of hair and nails — biotin + Activated Silicon^® from JarroSil^® + bioavailable sulfur from MSM.* Biotin is essential for normal hair growth and is associated with nail health.* MSM is an organic source of bioavailable sulfur. Sulfur-containing compounds are found in high concentrations in keratin and collagen.* Keratin, the key structural component of the hair & nails, gets much of its strength and stability from sulfur-based “bridges.” Silicon, likewise, is needed for the health of the hair & nails as a major mineral component. JarroSil^® is patented Activated Silicon^® supplying stabilized molecular clusters of orthosilicic acid (OSA). JarroSil^® Activated Silicon^® contributes bioavailable silicon for the formation of keratin and the support and repair of the hair & nails.*