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Zinc (Serum or Plasma Mass Concentration)

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of zinc, a trace mineral essential for immune function, metabolism, and wound healing, present in your blood.

Quick summary

["Zinc helps support immunity and may affect how your body uses certain vitamins."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
5761-2
Short code
Zinc RBC-mCnc
Synonyms
Zinc RBC-mCnc
Category
chemistry
Sample
whole-blood
Container
Lavender-top (EDTA)
Units
N/A
Ref low
4.2
Ref high
5.9
Critical range
2 N/A – 7 N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
CPT
85041
SNOMED
900000000000003001
Specimen volume
3 mL
Stability
Room temperature: 4h, Refrigerated: 24h
Hemolysis max
0
Lipemia max
0
Icterus max
0
TAT
4–24 hours
Order
routine

Why Might You Need This Test?

Your healthcare provider may order this test to check for zinc deficiency, which can cause symptoms like frequent infections, hair loss, or poor wound healing. It may also be used to monitor zinc levels if you’re taking supplements or have conditions like chronic diarrhea or malabsorption.

What Does the Test Involve?

A blood sample is drawn from a vein in your arm. The sample is sent to a lab where zinc levels are measured using a specialized analytical technique, typically a form of mass spectrometry or immunoassay.

What to Expect Before or After the Test

No special preparation is usually needed, but avoid taking zinc supplements 24 hours before the test if possible. After the draw, you may experience mild discomfort or bruising at the site, which should resolve quickly.

Common Reasons for Abnormal Results

Low zinc levels may indicate deficiency due to poor diet, malabsorption, or certain medical conditions. High levels could suggest kidney disease, liver problems, or certain medications. Your provider will discuss results in the context of your overall health.

Reference range

Adult males: 4.2-5.9; Females: 3.8-5.1 x 10^12/LN/A

Specimen: whole-blood

No special preparation required. Stay well hydrated.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Zinc Level

Frequently asked questions

What questions might you have about this test?
Is there a normal range for zinc levels? No, reference ranges can vary by lab and may not apply to individual needs. Your provider will interpret results based on your health status.
Can zinc supplements affect this test?
Yes, taking zinc supplements or high amounts of zinc-rich foods (like nuts or seeds) before the test could give misleading results. Follow your provider’s instructions to avoid interference.
How often should I get this test?
Your provider will determine the timing based on your symptoms, medical history, or treatment plan. Regular monitoring may be needed if you have ongoing health concerns related to zinc levels.
  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 17, 2026. · Read our editorial policy