BioSil Advanced Hair + Nail Care provides you with the nutritional support your body needs for stunning beauty and vitality from within. Each expertly crafted serving delivers 100 mg of choline in the form of ch-OSA® (choline-stabilized orthosilicic acid) to strengthen hair and nails, Additionally, every serving also includes 5 mg of silicon. A potent mineral, silicon provides support for the natural production of collagen, elastin and keratin needed for healthy hair, skin and nails. As an added bonus, BioSil Advanced Hair + Nail Care includes 65 mcg of biotin (vitamin B7) in every capsule. Known as the "beauty nutrient," biotin has been linked to promoting the growth of hair and nails while also contributing to their structural strength and vitality.