Copper optimal range and reference range

Compiled by Alina Radu, founder of Sera, from the published sources below · Last reviewed November 9, 2026

Sera's bands for Copper, which differ for men and women:

Female: Optimal 80 – 120 μg/dL (12.6 – 18.9 μmol/L); sufficient 80 – 155 μg/dL (12.6 – 24.4 μmol/L); out of range below 80 or above 155 μg/dL.
Male: Optimal 80 – 120 μg/dL (12.6 – 18.9 μmol/L); sufficient 70 – 140 μg/dL (11 – 22 μmol/L); out of range below 70 or above 140 μg/dL.

Evidence grade: Published reference interval. A band that primarily reflects a published adult laboratory or population reference interval. It is not necessarily applicable to every assay or laboratory.

All units

Unit	Applies to	Optimal	Sufficient	Out of range
μg/dL	Female	80 – 120	80 – 155	below 80 or above 155
μg/dL	Male	80 – 120	70 – 140	below 70 or above 140
μmol/L	Female	12.6 – 18.9	12.6 – 24.4	below 12.6 or above 24.4
μmol/L	Male	12.6 – 18.9	11 – 22	below 11 or above 22
mg/L	Female	0.8 – 1.2	0.8 – 1.55	below 0.8 or above 1.55
mg/L	Male	0.8 – 1.2	0.7 – 1.4	below 0.7 or above 1.4

What the evidence says

The acceptable band follows a large US laboratory's adult reference interval: 70 to 140 µg/dL for men and 80 to 155 for women. Where the client's sex is not recorded, the men's figures are used. UK laboratories commonly report 11 to 25 µmol/L for all adults. Women run higher because oestrogen raises caeruloplasmin, the protein that carries copper: oral contraceptives, hormone therapy and pregnancy can lift serum copper well above the band, as can any inflammation, so read a high result beside CRP before treating it as copper excess. A low result is seen with high-dose zinc, malabsorption and corticosteroids. The optimal band of 80 to 120 µg/dL has no published threshold behind it.

Assay: Results differ meaningfully between platforms and methods. Compare against the interval printed by the issuing laboratory before acting on a borderline value.

Sources

Copper, Serum or Plasma — ARUP Laboratories, 2026 · Laboratory / reference-interval sourceAdults 19 years and older: men 70 to 140 µg/dL, women 80 to 155 µg/dL. The male interval is Sera's current acceptable band; the female interval is the basis for the proposed female row.
Copper, Serum or Plasma — Labcorp, 2026 · Laboratory / reference-interval sourceOver 30 years: men 66 to 121, women 76 to 142 µg/dL; 16 to 30 years: men 62 to 115, women 73 to 140. Confirms that women's intervals run about 10 to 20 µg/dL higher than men's.
Copper (Plasma/Serum) — Black Country Pathology Services (Trace Elements Laboratory, Sandwell; NHS), 2026 · Laboratory / reference-interval sourceChildren over 12 months and adults: 11 to 25 µmol/L, with 25 to 39 in pregnancy beyond 15 weeks. The lower limit matches Sera's 11 µmol/L; the upper limit is 3 above Sera's 22.

What Copper measures

A trace mineral that helps you absorb iron, build connective tissue, and protect cells from damage.

Copper and zinc need to stay in balance for healthy immunity and hormone production. When that balance is off, several body systems can be affected.

Related vitamins & minerals markers

See Copper in the full list of biomarker ranges

This page is a reference for practitioners, not medical advice. Sera's bands are practitioner targets for structured review, not diagnostic thresholds, and Sera does not diagnose or recommend treatment. Read a result alongside the interval printed by the issuing laboratory and the client's history and symptoms. Range set: Sera Production, version 1.0, last reviewed November 9, 2026.