Collagen is one of the proteins that is most abundant in the human body. It is a building block for ligaments, tendons, muscles skin and bones. It is also found in many other parts of the body that include: teeth, corneas and blood vessels. Collagen behaves like glue and is good for the body it is a protein that holds most of the body structures together. Four Types of Collagens: Type 1- which accounts for…"What Is Collagen Good For? "