Written by the Plenthera team (orthomolecularly trained). Scientifically reviewed in April 2026. Last updated: April 30, 2026.
Copper is a mineral that is sufficiently obtained from food in most diets — nuts, shellfish, liver, seeds, dark chocolate. But those who supplement zinc for long periods in high dosages (>15 mg/day) face a specific challenge: zinc and copper compete for absorption, and chronically high zinc can cause copper deficiency. At Plenthera, you will find copper in chelated forms for optimal absorption — individual products for balance-conscious use and combined formulas where zinc and copper are dosed together.
Which copper is right for you?
| Form | Best for |
|---|---|
| Bisglycinate | First-line, sensitive stomach, premium |
| Gluconate | General use, cost-effective |
| Sulfate | Traditional, classic |
| Zinc + copper combo | For active zinc supplementation |
| In multimineral | Broad coverage, no separate calculation |
What is copper?
Copper (Cu) is an essential trace element. It is a cofactor in many enzymes, including ceruloplasmin (iron transport), superoxide dismutase (antioxidant), and cytochrome c oxidase (mitochondrial energy production). An adult body contains approximately 100-150 mg of copper.
Copper is one of those minerals where the balance ratio is more important than the absolute amount. The body strictly regulates copper levels through absorption and excretion — an average diet provides enough to meet the RI of 1 mg/day. For most people, targeted copper supplementation is therefore not necessary.
However, there are specific situations where copper supplementation becomes logical. The most important is long-term high zinc use. Zinc and copper compete for absorption in the intestine — high zinc intake gradually blocks copper absorption. With chronic zinc use above 15 mg/day (longer than 8 weeks), a functional copper deficiency can develop, with paradoxical symptoms: anemia that does not respond to iron supplementation (because ceruloplasmin — copper-dependent — transports insufficient iron), fatigue, poor wound healing.
Premium zinc supplements therefore often add 1-2 mg of copper in the correct ratio (zinc:copper 8:1 to 15:1). For those who buy zinc and copper separately: a separate copper supplement of 1-2 mg per day is sufficient for standard zinc supplementation. Also check our zinc category and multimineral category where the balance has been systematically considered.
Copper and EFSA — what is scientifically recognized?
Copper has an extensive set of recognized EFSA claims, included in EU Regulation 432/2012:
"Copper contributes to the maintenance of normal connective tissues."
"Copper contributes to normal energy-yielding metabolism."
"Copper contributes to the normal functioning of the nervous system."
"Copper contributes to normal iron transport in the body."
"Copper contributes to normal hair pigmentation."
"Copper contributes to normal skin pigmentation."
"Copper contributes to the normal function of the immune system."
"Copper contributes to the protection of cells from oxidative stress."
Threshold: claims apply with a daily intake of at least 15% RI — which is 0.15 mg of copper per serving. Our products typically deliver 1-2 mg per serving, well above the threshold and below the EFSA upper limit of 5 mg/day.
Zinc-copper balance — when is copper supplementation needed?
Zinc and copper have a specific interaction that determines whether supplementation is beneficial:
Standard zinc intake (<10 mg/day from food + supplement): No separate copper supplementation needed. Food provides sufficient copper.
Light zinc supplementation (10-15 mg/day): No problem for most people. For maintenance over longer periods: copper in a multimineral is sufficient.
High zinc supplementation long-term (>15 mg/day, >8 weeks): Copper supplementation recommended — 1-2 mg/day. Zinc:copper ratio 8:1 to 15:1.
Therapeutic zinc dosages (>40 mg/day): Copper supplementation of 2 mg/day is necessary to prevent copper deficiency. Preferably under the supervision of a doctor or orthomolecular therapist.
Multimineral route: Many multiminerals offer zinc + copper in the correct ratio — practical without individual calculations. Check out our multimineral category.
The copper forms at Plenthera
Copper bisglycinate
Chelated form with high absorption and gentle gastric tolerability. Our first-line recommendation. Dosages typically 1-2 mg.
Copper gluconate
Classic form with good absorption. Cost-effective. Similar effectiveness to bisglycinate in most situations.
Copper sulfate
Classic oldest form. Lower absorption than chelated forms. For those who prefer a traditional approach.
Zinc + copper combined (in correct ratio)
For those who want to maintain balance without managing two separate products. Zinc:copper 8:1 to 15:1.
Copper in multiminerals
Part of a complete formula with correct mineral ratios. Check out our multimineral category.
How to use copper?
Simple basic approach for copper:
- Determine if supplementation is needed: with active zinc supplementation (>15 mg/day long-term) or via the multimineral route — otherwise, usually sufficient from food.
- Standard dosage: 1-2 mg/day. With high zinc supplementation (>40 mg/day): 2 mg/day.
- Choose bisglycinate for optimal absorption and gentle gastric tolerability.
- Do not take copper simultaneously with zinc (competition) or large iron dosages — distribute over different times.
- For balance-conscious use: combination of zinc + copper in the correct ratio (8:1 to 15:1) or multimineral.
- Avoid dosages >5 mg/day (UL) without medical supervision.
- For Wilson's disease (genetic copper accumulation disorder): DO NOT use without consulting a doctor.
- For medication (especially D-penicillamine): consult beforehand.
Myths and misconceptions about copper
Myth 1: "Everyone needs a copper supplement."
Incorrect. A varied diet provides most people with sufficient copper. Separate supplementation is especially relevant with long-term high zinc use.
Myth 2: "High copper intake is always safe."
Incorrect. Above UL (5 mg/day), excess copper can have toxic effects — liver burden and oxidative stress. With Wilson's disease, it can be very serious.
Myth 3: "Copper bracelets or copper water have health effects."
Limited evidence. Topical copper or copper from tap water provides a negligible systemic dose. For targeted supplementation, oral supplementation is the proven route.
Myth 4: "Supplementing zinc without copper is always harmful."
Not at common dosages. Below 15 mg zinc/day, acute copper supplementation is usually not necessary. Above that limit and with long-term use, it becomes logical.
Combining copper with other supplements
Copper works primarily in a mineral-balance context. Many common combinations:
- Zinc: crucial balance partner.
- Iron: copper is a cofactor in ceruloplasmin for iron transport.
- Multiminerals: complete formula with balance.
- Vitamin C: high vitamin C dosages can affect copper status — consider targeted supplementation.
- Manganese: another trace element cluster — usually together in a multimineral.
- Multivitamin: for broad coverage.
Frequently asked questions
What is copper?
Essential trace element, cofactor in ceruloplasmin (iron transport), antioxidant enzymes, and mitochondrial energy.
Which copper is best?
Bisglycinate: high absorption, gentle. Gluconate: cost-effective. Combo with zinc: for active zinc supplementation.
How much copper per day?
RI 1 mg/day. For long-term zinc >15 mg: 1-2 mg/day recommended. UL 5 mg/day.
When to take copper?
With a meal. Not simultaneously with zinc — distribute over different times.
Do I need copper with zinc supplementation?
For long-term >15 mg zinc/day: yes, 1-2 mg copper. For common dosages: usually not acutely needed.
What is the zinc-copper balance?
Zinc:copper ratio = 8:1 to 15:1 for long-term balance. Multiminerals follow this ratio.
Does copper help with connective tissue?
EFSA-recognized claim: copper contributes to the maintenance of normal connective tissues.
What are copper deficiency symptoms?
Anemia that does not respond to iron, fatigue, weak connective tissues, premature graying, neurological signals.
Can copper deficiency cause iron deficiency anemia?
Yes. Copper is a cofactor in ceruloplasmin — severe deficiency disrupts iron transport.
Does copper have side effects?
Well tolerated at common dosages. At high dosages, possible stomach complaints, liver burden. Avoid with Wilson's disease.
Sources
- EFSA Regulation (EU) 432/2012 — copper claims.
- EFSA NDA Panel — Tolerable Upper Intake Level for copper (2003).
- Collins JF. & Klevay LM., "Copper", Adv Nutr (2011).
- Osredkar J. & Sustar N., "Copper and Zinc, Biological Role and Significance of Copper/Zinc Imbalance", J Clin Toxicol (2011).
Disclaimer: This text is intended for informational purposes only and does not replace medical advice. Copper is a dietary supplement, not a medicine. If in doubt or if you are taking medication, we recommend consulting a doctor or orthomolecular therapist first.