Proteins as collagen are made of amino acids, such as glycine, proline, arginine, hydroxyproline, which are amino acids that exist in collagen in varying proportions, depending upon the source. As the largest protein in the body, collagen is a chain of over 1500 amino acids.
Collagen is the connective tissue for almost all our structures, including: heart, lungs, arteries, discs, blood cells, skin, muscles, bones, cartilage, liver, hair, joints, nails and organs as prostate.
As we age, collagen production drops way off, and any of these systems can be affected.
Most common example of collagen decrease: wrinkles and flattering muscles, which doctors call ptosis.
In the organs, decreased collagen causes instability and weakness. Organs like the heart and prostate may enlarge; other organs just get flimsier and weaker. For this type of degenerative problem, drugs rarely work.
Collagen peptides can help. They stimulate the body to synthesize new collagen, so restructuring the body.