Collagen is the most abundant protein in the human body. Found in the bones, muscles, skin and tendons. It is the substance that holds the bode together and forms a scaffold to provide strength and structure.
Collagen occurs throughout the body, but especially in the skin, bones, and connective tissues. Some types of collagen fibrils, gram-for-gram, are stronger than steel. Collagen production declines with age and with exposure to factors such as smoking and UV light.
There are at least 16 different types of collagen, but 80 to 90 percent of them belong to types 1,2, and 3. These different types have different structures and functions. The collagens in the human body are strong and flexible. Supplementing with collagen provides specific amino acids like proline, hydroxyproline, and glycine to support the body's own production of collagen.