Gaspari Ageless Collagen bars are made from all-natural foods containing 15g of hydrolyzed Bovine collagen. Collagen is the most common protein in the body. It is one of the most important building blocks for bones, skin, muscles, tendons, and connective tissue. Collagen is responsible for the firmness and elasticity of the skin which can help in giving you a more youthful appearance. Gaspari ageless Collagen Bars also contain 10g of prebiotic fiber that can help with digestion.