Skip to main content
Supplement ScienceSupplementScience

Benefits of Copper

Evidence:Moderate
·

This content is for informational purposes only and does not constitute medical advice. Statements about dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease. Individual results may vary — consult your healthcare provider before starting any supplement. Full disclaimer

Evidence-Based Benefits

  • Iron metabolism — ceruloplasmin (a copper-dependent enzyme) is required to oxidize iron for transport by transferrin; copper deficiency causes a secondary iron deficiency anemia unresponsive to iron supplementation
  • Connective tissue integrity — lysyl oxidase requires copper to cross-link collagen and elastin fibers, essential for skin, blood vessel, and bone strength
  • Energy production — cytochrome c oxidase, the terminal enzyme in the mitochondrial electron transport chain, requires copper for ATP synthesis
  • Antioxidant defense — copper-zinc superoxide dismutase (SOD1) is a critical cytoplasmic antioxidant enzyme that neutralizes superoxide radicals
  • Neurological function — copper is involved in neurotransmitter synthesis (dopamine beta-hydroxylase converts dopamine to norepinephrine) and myelin maintenance

What the Research Says

Copper research has primarily focused on deficiency and toxicity rather than therapeutic supplementation. A key clinical finding is zinc-induced copper deficiency: Prasad et al. (1978) and subsequent studies confirmed that zinc supplementation above 50mg/day for extended periods reliably induces copper deficiency, manifesting as anemia, neutropenia, and neurological symptoms. Willis et al. (2005) reported cases of copper deficiency myelopathy mimicking B12 deficiency following chronic zinc supplementation. Current clinical practice recommends 1-2mg supplemental copper whenever zinc exceeds 30mg/day.

Recent studies have explored the relationship between copper and various health conditions. Zhou et al. (2025) conducted a meta-analysis of 13 studies involving 7983 participants, finding that circulating copper levels are significantly higher in osteoarthritis patients compared to healthy individuals, while zinc levels do not differ. Gutiérrez-Guerra et al. (2025) systematically reviewed and meta-analyzed 3 observational studies (n=9059), revealing a modest link between higher dietary copper intake and increased lumbar spine bone mineral density (BMD). Anam et al. (2024) conducted a systematic review and meta-analysis of 41 studies involving 3353 vitiligo cases and 10,638 controls, finding lower serum zinc and copper levels in vitiligo patients compared to controls.

Additionally, Pelosi et al. (2024) found that copper concentrations above 80 mg/kg dry soil can harm earthworms, with sub-lethal effects occurring at lower levels and varying by soil type. These findings highlight the importance of understanding copper's role in human health and its potential environmental impacts.

Related Conditions

Immune Function
Full Copper Guide

References

  1. Case reportWillis MS, Monaghan SA, Miller ML, et al. (2005). Zinc-induced copper deficiency: a report of three cases initially recognized on bone marrow examination. American Journal of Clinical Pathology. DOI PubMed
  2. RCTTurnlund JR, Jacob RA, Keen CL, et al. (2004). Long-term high copper intake: effects on indexes of copper status, antioxidant status, and immune function in young men. American Journal of Clinical Nutrition. DOI PubMed
  3. ReviewBost M, Houdart S, Oberli M, Kalonji E, Huneau JF, Margaritis I (2016). Dietary copper and human health: Current evidence and unresolved issues. Journal of Trace Elements in Medicine and Biology. DOI PubMed
  4. Meta-analysisZhou H, Zhang Y, Tian T, Wang B, et al. (2025). Meta-analysis of the Relationship Between Zinc and Copper in Patients with Osteoarthritis.. Biological trace element research. DOI PubMed
  5. Muñoz-Bravo C, Marín-Burdallo I, González-Herrera L, González-Palacios Torres C, et al. (2025). Copper in colorectal cancer patients: a systematic review and meta-analysis.. Carcinogenesis. DOI PubMed
  6. Gutiérrez-Guerra MA, Puerto-Parejo LM, Pastor-Ramón E, Pedrera-Canal M, et al. (2025). Dietary Copper Intake and Bone Health: A Systematic Review and Meta-Analysis of Observational Studies.. Calcified tissue international. DOI PubMed
  7. Meta-analysisAnam K, Ananyan S, Rishabh M, Dinesh A, et al. (2024). Zinc, copper, and selenium levels in vitiligo: a systematic review and meta-analysis.. Scientific reports. DOI PubMed
Show 4 more references
  1. Heuschele J, Lode T, Konestabo HS, Titelman J, et al. (2022). Drivers of copper sensitivity in copepods: A meta-analysis of LC50s.. Ecotoxicology and environmental safety. DOI PubMed
  2. Jiang Q, Zhang F, Han L, Zhu B, et al. (2021). Serum Copper Level and Polycystic Ovarian Syndrome: A Meta-Analysis.. Gynecologic and obstetric investigation. DOI PubMed
  3. Gu K, Li X, Xiang W, Jiang X (2020). The Relationship Between Serum Copper and Overweight/Obesity: a Meta-analysis.. Biological trace element research. DOI PubMed
  4. Genoud S, Senior AM, Hare DJ, Double KL (2020). Meta-Analysis of Copper and Iron in Parkinson's Disease Brain and Biofluids.. Movement disorders : official journal of the Movement Disorder Society. DOI PubMed