Collagen fibrils are polyproline-hydroxyproline trihelices. The main amino acids are proline and glycine, with some lysine (hydroxylated to hydroxylysine) present that is absolutely necessary for crosslinking of fibrils to form larger fibres.
G. Leon has written: 'Crosslinking of low-density polyethylene'
Generally, collagen type of skin is type I collagen
Collagen fibers are made up of many collagen fibrils (smaller individual unit)
what is collagen secreted by
collagen fibers
made mostly of collagen
collagen
collagen is a form of protein
Collagen supplements mainly have risks if you have food sensitivities or find that you are allergic to collagen injections. Outside of these possibilities, there are no risks to collagen supplements.
Abu bin Amu. has written: 'Bisperoxycarbamates as crosslinking for natural and polyisoprene rubbers'
15 grams of collagen at bedtime.