Test library
Zinc Level Test
A zinc blood test measures the amount of zinc in the blood to look for deficiency or excess. Zinc supports immune function, wound healing, and many enzyme reactions.
Order Zinc Blood Test - Zinc Deficiency Testing
Order online and visit a local collection site, or choose an at-home kit where available. No referral and no insurance required.
Order Zinc Blood Test - Zinc Deficiency Testing- Typical turnaround
- 1-3 business days
- Starting price
- From $38
- Results
- Confidential, online
Quick answer
The zinc blood test measures the concentration of zinc in a blood sample. Zinc is a mineral the body cannot store in large amounts, so intake and absorption matter for maintaining normal levels. The test is used when deficiency or excess is suspected, and results are reviewed with diet, symptoms, and other laboratory findings.
What this test measures
Zinc is an essential trace mineral involved in immune function, wound healing, growth, and the activity of many enzymes. Because the body has no large reserve, low intake or poor absorption can gradually reduce levels. Symptoms of deficiency can be subtle and overlap with other conditions, so laboratory testing helps clarify the picture.
The test measures zinc concentration in serum or plasma from a single blood draw. Zinc levels can shift with recent meals, time of day, inflammation, and other health conditions, so the sample is usually collected under standardized conditions. The result is interpreted alongside other tests such as copper and a complete blood count.
Clinicians may order zinc testing for people with poor dietary intake, digestive conditions that impair absorption, chronic illness, or symptoms that suggest deficiency. It can also be used to check for excess when supplements are taken in high amounts. A qualified healthcare provider interprets the result and advises on next steps.
- Serum zinc
- Plasma zinc
- Copper (often paired with zinc)
- Ceruloplasmin
- Alkaline phosphatase (zinc-dependent enzyme)
- Complete blood count with differential
- Albumin
- C-reactive protein (to assess inflammation)
Why people order this test
- Investigate suspected zinc deficiency
- Evaluate poor wound healing, hair loss, or frequent infections
- Check zinc status when dietary intake is limited
- Assess zinc levels in digestive conditions that impair absorption
- Monitor for excess when supplements are used
- Follow up on abnormal copper or alkaline phosphatase results
How to prepare
Fasting may be requested because recent food intake can affect zinc levels. A blood sample is drawn from a vein, usually at the arm. Follow the laboratory's timing instructions, and tell the ordering provider about supplements or medications.
Understanding your results
Results are typically available within one to three business days. The report shows the zinc concentration alongside any reference range. Values outside the range can reflect deficiency or excess, but a healthcare provider interprets them with diet, symptoms, and other tests.
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Frequently Asked Questions
What is a zinc blood test used for?
It measures zinc in the blood to help identify deficiency or excess. Zinc affects immune function, healing, growth, and many enzyme reactions.
Do I need to fast before the test?
Fasting is often recommended because recent meals can change zinc levels. Follow the specific instructions provided by the laboratory.
What can cause low zinc?
Limited dietary intake, poor absorption from digestive conditions, and some chronic illnesses can lower zinc levels. A healthcare provider evaluates the cause.
Can taking supplements affect the result?
Yes. High-dose supplements can raise zinc levels, and long-term excess can cause other problems. Sharing a supplement list supports accurate interpretation.
Should copper be tested at the same time?
Copper is often measured alongside zinc because the two minerals interact. The ordering provider decides whether to include it.
Ready to get tested?
Order online and visit a collection site near you, or choose a mail-in kit. No referral and no insurance required.
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