Copper in blood: normal levels in women and men, low and high — causes

In shortNormal copper in serum is 0.75–1.45 mg/L (12–23 µmol/L). Deficiency causes anemia and neutropenia unresponsive to iron; excess occurs with inflammation, estrogen intake and Wilson’s disease. Copper and zinc are antagonists: excess of one lowers the other.

What this marker is

Copper is part of the enzymes of blood formation, collagen synthesis and protection from oxidation. In blood it is bound to ceruloplasmin — so with inflammation the level rises (ceruloplasmin is an acute-phase protein).

Copper deficiency is a hidden cause of anemia unresponsive to iron preparations and of neurological symptoms. A common everyday cause is years of high-dose zinc intake.

Reference ranges

Group	Reference range
Adults	0.75–1.45 mg/L (12–23 µmol/L)
Pregnancy	physiologically elevated — up to 1.5–2 times by term
Children	below adults in the young; per the lab report

Copper rises with inflammation, pregnancy and estrogens (including contraceptives) — that is not excess. The true picture shows with ceruloplasmin. Ranges differ between laboratories.

Check your value

Enter the number from your lab report — see how it compares with the typical range. Mind the units shown in the chosen row.

An approximate comparison with a typical range, not a diagnosis. Ranges differ between laboratories — use the one on your report; a doctor interprets the result.

Units and conversion

Measured in: µmol/L

µmol/L=µg/dL

µg/dL = µmol/L × 6.36 (copper, molar mass 63.5)

When it is high or appears: possible causes

Inflammation and infectionsCeruloplasmin rises as an acute-phase protein.

EstrogensPregnancy and hormonal contraceptives physiologically raise copper.

Wilson’s diseaseA rare inherited copper excretion disorder — important not to miss.

When it is low: possible causes

Long-term zinc intakeThe main everyday cause: zinc blocks copper absorption.

Impaired absorptionGI disease, after bariatric surgery.

Menkes diseaseA rare inherited deficiency in boys.

What can skew the result

These factors can shift the result without any disease — keep them in mind before a retest:

Zinc supplementsInflammationHormonal contraceptivesPregnancy

How to prepare

In the morning, fasting (8–12 hours), venous blood. Biotin (vitamin B7) in multivitamins can distort some immunoassays — tell the doctor about supplements. Details: Preparation: venous blood.

When a retest makes sense

Deficiency is confirmed by a repeat test in 2–4 weeks; monitoring during supplements is set by the doctor, usually at 8–12 weeks.

Who usually reviews this result

An out-of-range result is usually reviewed by: Primary care physician, hematologist. Bring your report and any previous results to the visit.

Names used on lab reports

Look for one of these names on your report:
CopperCopperCopper

Several markers on your report?

The app reads your whole report — this marker together with its neighbors, not one by one.

Get your results explained See an example

Frequently asked questions

Anemia unresponsive to iron — what does copper have to do with it?

Copper is needed by the enzymes that activate iron into hemoglobin. With its deficiency, anemia persists despite iron — a typical picture after years of zinc intake.

Copper elevated — is that dangerous?

Usually not: inflammation, pregnancy and estrogens raise copper without body overload. True overload (Wilson’s disease) is confirmed by ceruloplasmin and 24-hour urinary copper.

Should copper and zinc be tested together?

Yes: they are antagonists, and looking at one without the other is meaningless — zinc excess causes copper deficiency and vice versa.

Sources

MedlinePlus — Zinc blood test — MedlinePlus (medlineplus.gov). Accessed: September 17, 2026.
MedlinePlus — Vitamin A test — MedlinePlus (medlineplus.gov). Accessed: September 17, 2026.

Copper