Skip to content
Deficiency/Immunity

Copper

Essential trace mineral that corrects low copper status and related anemia in adults with low intake, malabsorption, or high zinc use.

Copper
57
score
C
evidence
Caution
risk

Our methodology: How we evaluate supplements and turn the underlying research into a single rating.

Read full methodology
Use with caution

This supplement may interact with medications, medical conditions or sensitive populations. Review safety before use.

Quick Take

Useful mainly when deficiency is confirmed or zinc intake is high — too much copper is not benign.

Copper is an essential trace mineral found in shellfish, liver, nuts, seeds, cocoa, and legumes. It serves as a cofactor for enzymes involved in iron transport, antioxidant defense, energy production, and collagen cross-linking. The clearest use of supplementation is correcting low copper status and the anemia or neutropenia it can cause; smaller human studies suggest it may help some neurologic symptoms and other deficiency manifestations. People most likely to benefit are those with confirmed deficiency, malabsorption, or long-term high-dose zinc use.

Potential benefits

01
Corrects copper deficiency
02
Restores deficiency-related anemia
03
Restores low neutrophil counts
04
May improve neurologic symptoms
05
May support bone/connective tissue
06
May reverse hair depigmentation

Protocol

Amount
1-2 mg
Frequency
Once daily
When
With food; separate from high-dose zinc or iron by at least 2 hours.

Onset Time

2-8 weeks for labs and blood counts; neurologic recovery may take months

Who Should Consider

Adults with low serum copper or ceruloplasmin
Long-term high-dose zinc users
People after bariatric surgery or with malabsorption
Adults with unexplained anemia or low neutrophils after
People with very low copper intake

Food Sources

  • Beef liver (~10 mg per 85 g)
  • Oysters and other shellfish (~0.5-2 mg per serving)
  • Cashews (~0.6 mg per 28 g)
  • Sunflower seeds (~0.5 mg per 28 g)
  • Dark chocolate 70-85% (~0.5 mg per 28 g)
  • Shiitake mushrooms (~0.7 mg per cooked cup)

How It Works

Copper is required for enzymes such as ceruloplasmin, cytochrome c oxidase, superoxide dismutase, and lysyl oxidase. These help mobilize iron for red blood cell formation, support mitochondrial energy production and antioxidant defense, and cross-link collagen and elastin in connective tissue.

Updated 5/19/2026

Put Copper in context.

Compare the closest evidence-ranked options, or see how this supplement fits your goals and what you already take.

Is Copper right for your goals?

Answer four quick questions for recommendations that already account for the supplement you just reviewed.

Get recommendations