Dr. Mercola's Organic Collagen Powder is made with Organic Beef Bone Broth, sourced from US grass fed cattle raised without the addition of antibiotics or hormones. Collagen helps to support healthy skin and elasticity, aids to strengthen hair and nails, and promotes joint health and flexibility. Consuming collagen may also help kick-start your body's natural collagen production. Bone broth collagen is also ideal to help soothe the gut, and promote the growth of connective tissue in the gut for a healthy gut lining.