Copper (as glycinate)

Tier 2 — promising · Iron metabolism · Collagen · Immunity

Essential for iron metabolism, collagen formation, and antioxidant defense in the body. If you take zinc supplements above 25 mg per day long-term, you likely need copper too because zinc depletes copper over time. Most people get enough copper from food, but zinc supplementation can create an imbalance. Safe at recommended doses of 1 to 2 mg per day.

Dose: 1–2 mg/day copper glycinate; required if supplementing zinc >25 mg/day long-term