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Zinc, Serum Concentration (Mass Concentration)

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

This test measures the amount of zinc, a mineral essential for many bodily functions, in your blood serum.

Quick summary

["Zinc helps support immune function, wound healing, and metabolism—low levels may signal deficiencies or health concerns."]

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

Key facts at a glance

LOINC
16180-2
Short code
Zinc Tiss-mCnt
Synonyms
Zinc Tiss-mCnt
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 Is This Test Done?

Your doctor may order this test to check for zinc deficiency, which can cause symptoms like fatigue, hair loss, or weakened immunity. It may also be part of a broader evaluation for chronic illnesses, infections, or malabsorption disorders.

What to Expect During the Test

A small blood sample is taken from a vein in your arm. The sample is sent to a lab for analysis. Results are typically ready within 1–3 business days.

Common Reasons for Testing

Zinc testing is often done if you have symptoms of deficiency (e.g., frequent infections, slow wound healing) or if you’re at higher risk (e.g., long-term alcohol use, certain gastrointestinal conditions). It may also be included in routine screenings for certain populations.

Possible Results and Interpretation

Results are compared to standard reference ranges, but individual needs vary. Low zinc levels may indicate dietary insufficiency, absorption issues, or underlying health conditions. High levels could signal kidney disease or certain medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Zinc Level

Frequently asked questions

What Might Cause Low Zinc Levels?
Zinc deficiency can stem from poor diet (low intake of foods like meat, nuts, or seeds), gastrointestinal disorders (e.g., Crohn’s disease), or excessive loss (e.g., diarrhea, kidney disease). Chronic illnesses like diabetes or liver disease may also affect zinc metabolism.
What Might Cause High Zinc Levels?
Elevated zinc levels can result from kidney disease, certain medications (e.g., antibiotics like tetracycline), or excessive supplementation. Rarely, genetic disorders may contribute.
How Can I Support Healthy Zinc Levels?
Eat zinc-rich foods (e.g., oysters, pumpkin seeds, legumes) and maintain a balanced diet. If deficient, your doctor may recommend supplements under supervision. Avoid overconsumption of zinc supplements, as it can interfere with other nutrients.
  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