Zinc
Measures zinc levels in blood to evaluate nutritional status and assess potential zinc deficiency or excess.
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What this test measures
This test measures the concentration of zinc in blood serum or plasma. Zinc is an essential element; it is a critical cofactor for carbonic anhydrase, alkaline phosphatase, RNA and DNA polymerases, alcohol dehydrogenase, and many other physiologically important proteins. Zinc is essential for immune function, wound healing, growth, taste, and reproductive health.
Because zinc has many functions throughout the body, zinc deficiency affects many different tissues and organs. Zinc deficiency can affect, for example, skin; bones; and the digestive, reproductive, central nervous, and immune systems. Zinc is a key element required for active wound healing. The body does not store zinc, so adequate dietary intake is necessary to maintain healthy levels. This blood test provides important information about an individual's zinc status and can help identify those who may benefit from dietary changes or supplementation.
Who should consider this test
You might consider this test if you are experiencing any of the following:
- Individuals experiencing symptoms of zinc deficiency such as frequent infections, slow wound healing, or hair loss
- Those with malabsorption disorders including Crohn's disease, celiac disease, or short bowel syndrome that may affect zinc absorption
- Vegetarians and vegans who may have limited zinc intake from plant-based diets
- Pregnant and breastfeeding women who have increased zinc requirements
- Individuals with chronic health conditions such as liver disease, kidney disease, or diabetes
- Those taking medications that may interfere with zinc absorption or increase zinc excretion
What to expect
Preparation
No special preparation is typically required. Some laboratories may recommend discontinuing zinc supplements, vitamins, and minerals upon physician advice before testing to avoid interference with results.
Sample Type
A blood sample is collected from a vein in the arm using a standard blood draw procedure.
Collection
The blood collection takes only a few minutes. A healthcare professional will clean the collection site, insert a needle into a vein, and collect the blood sample in a special metal-free tube to prevent contamination.
Turnaround
Results are typically available within 1-3 business days and no doctor visit required to order the test.
Understanding your results
Zinc levels in blood provide insight into the body's zinc status, though serum zinc represents only about 0.1% of the body's total zinc stores. Zinc in the blood represents only a tiny fraction (about 0.1%) of the body's total zinc. A normal level does not completely rule out tissue deficiency. Results should be interpreted alongside clinical symptoms and dietary history for a complete assessment.
| Population | Reference Range | Notes |
|---|---|---|
| Adults | 66-106 mcg/dL (10.1-16.2 μmol/L) | Normal range based on Mayo Clinic reference values |
| Adults (Alternative) | 60-130 mcg/dL (9.2-19.9 μmol/L) | Range may vary slightly between laboratories |
Reference ranges shown are general guidelines. Your lab report will include the specific reference range used by the laboratory that processed your sample, which is the authoritative range for interpreting your results.
What does a “Low” result mean?
Diarrhea: A common symptom and complication of zinc deficiency, persistent diarrhea exacerbates zinc loss and deficiency. Delayed wound healing: Zinc is crucial for tissue repair, and deficiency impairs the healing process. Zinc deficiency can delay growth and cause diarrhea and alopecia in children, and it can alter cognitive and psychological function in older adults. In pregnant women, zinc deficiency can increase the risk of maternal morbidity and adverse birth outcomes. Low zinc levels may also be associated with frequent infections, changes in taste or smell, and skin conditions. Causes of low zinc may include inadequate dietary intake, malabsorption disorders, or increased zinc losses from the body.
What does a “High” result mean?
Elevated zinc levels often result from excessive supplementation or dietary intake. While zinc is essential for health, too much can disrupt mineral balance and lead to adverse effects. The only known effect of excessive zinc ingestion relates to the fact that zinc interferes with copper absorption, which can lead to hypocupremia. Chronic zinc excess can lead to copper deficiency, as zinc competes with copper for absorption. High levels may also indicate occupational exposure or contamination during sample collection. Healthcare providers typically recommend reducing zinc supplementation or dietary sources when levels are elevated.
Privacy & confidentiality
All test orders are authorized and results reviewed by an independent, board-certified physician who is not the patient's personal doctor. Your zinc test results are completely confidential and handled with the highest level of privacy protection. Results are <u>not reported to your doctor</u> unless you specifically choose to share them, and they are <u>not part of your medical records</u> maintained by healthcare providers. The test results will <u>not appear on insurance statements</u> or explanation of benefits (EOB) since you pay directly for testing. Your employer, insurance company, or government agencies cannot access these results without your explicit consent. This privacy protection allows you to understand your zinc status and nutritional health discreetly, empowering you to make informed decisions about dietary changes or supplementation. All results are securely stored and can only be accessed through your private online account, giving you complete control over your health information.
Frequently asked questions
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CPT Code: 84630
This test may not be available in: NY, NJ, RI
This page is for informational purposes only and does not constitute medical advice. Always consult with a healthcare provider regarding any health concerns. LevelPanel does not diagnose, treat, or prescribe.
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