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doi:10.3390/medicina61020291 Wu H, Wei M, Li N, et al

Serious side effects are rare and typically linked to injections rather than oral supplements

Trachy, R (1988)

nor the F.D.A

Stimulation of collagen synthesis in fibroblast cultures by the tripeptide-copper complex glycyl-l-histidyl-l-lysine-Cu2+

A deficiency in zinc can lead to a weakened immune response, making supplementation beneficial for immunity support
