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Copper (Cu)
Cofactor for iron metabolism, connective tissue synthesis, and superoxide dismutase — must be balanced with zinc intake.
What the evidence says
Copper appears to help in 9 of 10 studies with measurable effects — the evidence leans clearly favourable.
Most evidence is from high-quality meta-analyses and randomised trials published 2016–2026 with a typical study size of 892 participants.
Based on 40 studies · 25 meta-analyses · 1 RCT · 282,559 total participants
Confidence
HighWhat the studies found
By outcome
Copper has an evidence score of 9/10 — very strong evidence based on 40 indexed studies, including 31 meta-analyses. Cofactor for iron metabolism, connective tissue synthesis, and superoxide dismutase — must be balanced with zinc intake.
The commonly studied dose of Copper is 1-2mg daily (typically to balance zinc). Individual needs vary — start at the lower end of the range and adjust based on how you respond.
The best time to take Copper is with meals. Taking it with food is preferred. Copper is an essential trace mineral required for ceruloplasmin (ferroxidase), cytochrome c oxidase, superoxide dismutase (Cu/Zn-SOD), and lysyl oxidase.
Last reviewed May 2026 · evidence from 40 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Copper is an essential trace mineral involved in numerous enzymatic reactions. It's critical for iron metabolism (ceruloplasmin), energy production (cytochrome c oxidase), connective tissue synthesis (lysyl oxidase), and antioxidant defense (superoxide dismutase). Copper must be balanced with zinc, as high zinc intake can deplete copper. Most people get adequate copper from diet, but supplementation may be needed when taking high-dose zinc.
Essential for iron transport and utilization
Component of superoxide dismutase
Required for collagen cross-linking
How Copper works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
1-2mg daily (typically to balance zinc)
Loading: Not required; maintain consistent intake
Take with food
| Form | Type |
|---|---|
| 💊Copper Bisglycinate (gentle, well-absorbed) | Recommended |
| 💊Copper Gluconate | Alternative |
| 💊Copper Citrate | Alternative |
| 💊Cupric Oxide (poorly absorbed) | Alternative |
Chelated forms like bisglycinate are gentler. Avoid copper oxide due to poor absorption.
Minimum: 4 weeks
Optimal: 12 weeks
Cycling: Not required
Note: Often taken at a 15:1 ratio with zinc (e.g., 30mg zinc with 2mg copper). Don't exceed needs.
Dose-response data unavailable. The current published research for Copper does not provide sufficient dose-specific outcome data to generate reliable dose-response curves.
Refer to the Dosage & Timing section above for recommended dose ranges based on available evidence.
Prevents zinc-induced copper deficiency
Supports mitochondrial energy production
Excess copper can be harmful
Add 1-2mg copper to prevent deficiency
High zinc depletes copper; balance needed
Chelates copper; used for Wilson's disease
Tip: Take with food; use chelated forms
Tip: Don't exceed recommended doses; avoid if Wilson's disease
Copper is generally safe at recommended doses, with a few precautions worth noting. The most commonly reported side effects are nausea, liver issues (excess). Use caution if any of these apply to you: Wilson's disease (copper accumulation disorder); Hereditary copper toxicity conditions.
Iron
Probably helpsEssential mineral for oxygen transport and energy production — critical for those with deficiency, especially women and athletes.
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