tendon

collagen + vitamin c

Vitamin C is a required cofactor for prolyl and lysyl hydroxylase, the enzymes that hydroxylate proline and lysine residues during collagen synthesis and stabilize the triple-helix structure. Taking collagen peptides (or gelatin) together with a source of vitamin C supplies both the amino acid building blocks and the enzymatic cofactor the body needs to assemble functional new collagen. This is a benign nutritional synergy, not a risk.