Protein

Collagen is the main structural protein in the extracellular space in the various connective tissues in animal bodies. 

As the main component of connective tissue, it is the most abundant protein in mammals, making up from 25% to 35% of the whole-body protein content.

Peptides

Collagen peptides is a fragment obtained by biological enzymatic hydrilysi collagen, which is composed of a few to more than a dozen amino acids and can be directly consumed.