Vitamins & minerals
Copper
LOINC 5631-1 · mcg/dL
Ranges
Reference range: 70–140 mcg/dL
What it is
Copper is a trace mineral your body needs in small amounts for energy production, iron handling, nerves and connective tissue.
Why it matters
The test helps assess copper status and rare disorders of copper handling, such as Wilson's disease.
What high values can mean
A higher value can relate to inflammation, certain conditions or copper-handling disorders.
What low values can mean
A lower value can relate to poor absorption, very high zinc intake or rare deficiency.
How to improve it
Most people get enough copper from a varied diet; deficiency or excess is managed with a clinician.
Food & lifestyle
Shellfish, organ meats, nuts, seeds and whole grains provide copper; excessive zinc supplements can lower it.
Preparing for the test
A blood test; fasting may be requested — follow your lab's instructions.
When to talk to a doctor
Discuss an abnormal copper with a doctor, who may add ceruloplasmin and other tests.
Sources
- MedlinePlus (NIH)
- NIH Office of Dietary Supplements
Content reviewed on June 26, 2026
Medical disclaimer
This content is for educational purposes only. It is not medical advice and does not diagnose, treat, or prevent any condition. Reference ranges vary between laboratories — always use the range printed on your report and discuss your results with a healthcare professional.
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