Last verified: 17 days ago
Copper (as Copper Citrate)
Also known as: Copper citrate, Cu, cupric citrate, dietary copper
Evidence under review. — Not yet rated
Essential trace mineral supporting energy, connective tissue, and immune function. Most people get enough from food.
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What it does
Copper is an essential trace mineral your body needs in tiny amounts to function properly. It helps enzymes that build connective tissue, produce energy in cells, absorb iron, and support immune...
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Evidence quality
Evidence base hasn't been formally rated yet. See research below.
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Clinical dose
0.9 mg daily (RDA for adults); upper limit 10 mg/day
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Found in
What the Science Says
Copper is an essential trace mineral your body needs in tiny amounts to function properly. It helps enzymes that build connective tissue, produce energy in cells, absorb iron, and support immune and nervous system health. Copper citrate is a chelated form — meaning the copper is bound to citric acid — which may improve absorption compared to some other forms, though no clinical trials from the provided data confirm this advantage.
What It Doesn't Do
Won't boost energy if you're not deficient. No evidence it builds muscle or burns fat. Not a treatment for any disease. Taking more than you need doesn't give extra benefits — it can actually be toxic. Most healthy adults eating a varied diet are not copper deficient.
Evidence-Based Benefits
Copper is required for enzymes that build collagen, produce energy, and protect cells from oxidative damage.
Weak EvidenceEffective at: 0.9 mg/day (adult RDA)
Adequate copper supports normal iron metabolism and helps prevent iron-deficiency anemia.
Weak EvidenceEffective at: 0.9 mg/day (adult RDA)
Copper deficiency impairs immune cell production; correcting deficiency restores normal immune function.
Weak EvidenceEffective at: 0.9 mg/day (adult RDA)
Absorption & Bioavailability
Moderate to Good — citrate chelation is generally considered more bioavailable than inorganic copper salts like copper sulfate, but no clinical trial data from provided studies confirms this. Absorption is reduced by high zinc, iron, or vitamin C intake.
Red Flags to Watch For
- Copper toxicity is real: doses above 10 mg/day can cause nausea, liver damage, and neurological symptoms — do not exceed the tolerable upper intake level
- High-dose zinc supplements (50+ mg/day) deplete copper — check your full supplement stack for interactions
- Copper deficiency is rare in healthy adults eating a balanced diet; supplementing without confirmed deficiency offers no proven benefit
- Wilson's disease patients must avoid copper supplements entirely — copper accumulates to dangerous levels in this genetic condition
- Marketing claims linking copper to anti-aging or collagen 'supercharging' are not supported by clinical evidence in healthy, non-deficient individuals
Products Containing Copper (as Copper Citrate)
See how Copper (as Copper Citrate) is used in these analyzed products:
Frequently Asked Questions
What does Copper (as Copper Citrate) do?
Essential trace mineral supporting energy, connective tissue, and immune function. Most people get enough from food.
What is the effective dose of Copper (as Copper Citrate)?
0.9 mg daily (RDA for adults); upper limit 10 mg/day
Is Copper (as Copper Citrate) safe?
Copper toxicity is real: doses above 10 mg/day can cause nausea, liver damage, and neurological symptoms — do not exceed the tolerable upper intake level
What doesn't Copper (as Copper Citrate) do?
Won't boost energy if you're not deficient.
Research Sources
- General knowledge — no research papers were provided for this analysis. Claims reflect established nutritional science and NIH/Institute of Medicine dietary reference values, not clinical trial data from this dataset.
This information is for educational purposes only and is not medical advice. Always consult a healthcare professional before starting any supplement regimen. Last updated: 2026-05-25