Healthy Hair, Nail Growth: American Standard Supplements Biotin offers the highest potency in the market. One capsule contains 20,000mcg of Biotin (Vitamin B-7) with Keratin, Organic Coconut and Zinc. One bottle is for 120 day supply. Just take one capsule per day for your hair and skin health. Biotin is known for healthy nail and hair growth. Our Biotin is combined with Keratin, that is good for eliminating frizz and smoothen your hair. Zinc is also added to reduce wrinkles and minimize acnes. The last ingredient, Coconut that is known for skin and hair health. Skin, Nails & Hair Vitamins - Our Biotin with Keratin & Collagen capsules will improve skin, hair, and nail health. Biotin is good to prevent hair loss and improve your texture and volume. These 4-1 ingredients in our beauty supplement promotes healthy nails, glowing skin and thick hair. Raw material is purity tested to ensure each of our ingredients meets our high-quality standard and are superior quality. Each ingredient is manufactured in an FDA-registered facility following GMP (Good Manufacturing Practices) rules, here in the USA. Our products are then third party Lab-Tested so you can be sure you are getting the very best for your body. As a small family business, here at American Standard Supplements, we only use highest quality ingredients without any artificial sweeteners, colors, preservatives, allergen free. Rest assured that we also go extra miles to source the best quality ingredients for our customers.