Copper

Copper is an essential trace mineral. This guide explains how much adults need, when supplements may be relevant, and what the evidence actually says about hair pigmentation, grey hair and popular weight-control claims.

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In this guideIngredient basics, choosing & product comparison

What is copper?

Copper is an essential trace mineral. The body needs it in small amounts, and it is naturally present in a range of foods. Supplements usually provide copper on its own or as part of a multimineral formula.

What does copper support?

Copper contributes to normal connective tissues, energy-yielding metabolism, normal functioning of the nervous system, normal iron transport, normal hair and skin pigmentation, normal immune-system function and the protection of cells from oxidative stress.

What happens if you don’t get enough copper?

Copper deficiency is uncommon, but it can affect blood formation, bones, connective tissue and the nervous system. Reported effects include anaemia, weak or brittle bones, loss of balance and coordination, and increased susceptibility to infection.

High zinc intake can reduce copper absorption

Long-term high-dose zinc supplementation can interfere with copper absorption and has caused copper deficiency. This is one reason zinc and copper should not be viewed independently when high supplemental zinc intakes are used.

Can copper restore grey hair?

Hair pigmentation is a particularly interesting copper topic because copper contributes to normal hair pigmentation as part of its normal physiological role. Copper is involved in melanin biology, which helps explain the connection. However, this is not the same as evidence that a copper supplement can reliably restore colour to hair that has already turned grey.

Copper and weight management

Copper is sometimes promoted in connection with metabolism, body weight or sweet cravings. Its contribution to normal energy-yielding metabolism helps explain the marketing link, but this is not the same as a weight-loss claim. Current evidence does not establish copper supplements as a reliable way to reduce body weight, appetite or sweet cravings.

Why the topic still belongs in this guide

“Metabolism” is easy to interpret as “weight loss” in supplement marketing. Separating the authorised energy-metabolism claim from broader weight-management promises helps shoppers understand what a copper product can legitimately claim.

How much copper do adults need?

Two useful reference values

The EU nutrient reference value (NRV) used on labels is 1 mg. EFSA’s adequate intake (AI) is 1.6 mg/day for adult men and 1.3 mg/day for adult women. NRV is a labelling reference; AI is a population dietary reference, not a personal supplement dose.

Copper forms and combination products

Supplements may contain copper gluconate, citrate or bisglycinate, and copper is also common in multivitamin and multimineral formulas. Products containing zinc deserve particular attention because high supplemental zinc intake can interfere with copper status.

What should you compare?

Copper / day

Compare the actual copper amount, not the total weight of the copper compound.

Form

Check which copper compound the product uses.

Zinc and other minerals

Combination products can change the reason for choosing the product.

Good to know: Copper is essential but excessive intake can be harmful. Copper supplementation deserves particular caution in people with disorders affecting copper metabolism or significant liver disease.

Product comparison

Compare copper supplements

Compare copper per day, form, serving, other active ingredients, format and vegan suitability.

Compare copper itself. The table shows the amount of elemental copper provided per recommended day, not the total weight of copper citrate, bisglycinate or another compound.

How products are ordered: by labelled daily copper amount, lower to higher; equal amounts alphabetically. This is not a ranking.

Product	Copper / day	Copper form	Recommended serving	Other active ingredients	Format	Vegan
Life Extension CopperView product ↗	2 mg	Copper amino acid chelate	1 capsule daily with a meal or water	—	Vegetarian capsule	Vegetarian; vegan not confirmed
Thorne Copper BisglycinateView product ↗	2 mg	Copper bisglycinate	1 capsule daily	—	Capsule	Not confirmed
Viridian Copper 2 mgView product ↗	2 mg	Copper citrate	1 capsule daily	—	Capsule	Not confirmed
Solgar Chelated CopperView product ↗	2.5 mg	Copper glycinate amino acid chelate	1 tablet daily, preferably with a meal	—	Tablet	Yes
NOW Foods Copper GlycinateView product ↗	3 mg	Copper bisglycinate	1 tablet daily with a meal	Organic fruit & veggie blend 50 mg	Tablet	Yes

EU health claim details

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Authorised health claims

A quick consumer view — full regulatory list available below

● Copper contributes to the normal function of the immune system.Immune system · General population

Claim type
Health functions (Article 13)

Condition of use
The claim may be used only for food which is at least a source of copper.

What does “source of” usually mean?
General food: 0.15 mg / 100 g or 100 ml
Beverage: 0.075 mg / 100 ml
Single-portion pack: 0.15 mg per portion
Calculated from the EU NRV significant-amount reference. Claim-specific conditions take precedence.