18 amino acids</br>Great for ligaments and tendons</br>Helps rebuild your key structural compound</br>Stronger hair and nails</br></br>Product Description</br></br>Collagen formula 1 and 3, contains 18 amino acids. This formula is great for ligament and tendons. This formula helps rebuild your key structural compound. This formula gives stronger hair and nails.</br><br/>http://www.amazon.com/gp/product/B006VAZYLS