Collagen has been proven to show an increase in your body’s hair building proteins resulting in longer, thicker, fuller hair. Rajani MD Multi Collagen Peptides provides a blend of 5 different sources of Collagen: Hydrolyzed Bovine Beef Bone Broth Chicken Bone Broth Egg Shell Membrane Hydrolyzed Fish Collagen This formula provides collagen Types I, II, III, V and X, hydrolyzed to help make it easier to digest and absorb. This product contains 19 amino acids creating a potent formula to provide the best results for hair, skin, nails, and joint support.