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Serum or plasma copper concentration (total copper level)

Published: August 9, 2026Updated: August 16, 2026

This test measures the amount of copper in your blood, which is important for many body functions, including forming red blood cells and maintaining healthy nerves.

Quick summary

["Copper levels help assess potential deficiencies or excesses that may affect your health."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
93728-4
Short code
Copper Dial fld-sCnc
Synonyms
Copper Dial fld-sCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms like fatigue, weakness, hair loss, or neurological issues that could be linked to copper imbalance. It may also be checked in cases of liver disease, Wilson’s disease, or genetic disorders affecting copper metabolism.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours before the draw if your test involves a fasting sample. Wear a loose shirt for easy access to your arm.

How the Test Works

A blood sample is taken from a vein in your arm. The sample is sent to a lab where it is analyzed to measure copper levels using a specialized method, often an immunoassay or enzymatic technique.

Possible Results and Next Steps

Results will compare your copper level to standard reference ranges. Low levels may indicate copper deficiency, while very high levels could signal conditions like Wilson’s disease or liver problems. Your provider will discuss findings with you.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Total Copper

Frequently asked questions

What causes copper levels to be too low?
Copper deficiency can result from poor diet (low copper intake), malabsorption issues (e.g., celiac disease), chronic liver disease, or certain medications. Rare genetic disorders may also disrupt copper metabolism.
What causes copper levels to be too high?
Excess copper is often linked to Wilson’s disease (a genetic disorder), liver disease, or excessive copper intake from supplements or contaminated foods. Rarely, kidney problems or certain medications can contribute.
How often should I get this test?
Your provider will determine testing frequency based on your symptoms, medical history, and risk factors. Routine screening is generally not recommended unless you have known conditions affecting copper metabolism.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy