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Serum or plasma concentration of zinc (mass concentration)

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

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

Quick summary

["Zinc levels help assess nutritional status and potential deficiencies."]

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

Key facts at a glance

LOINC
82746-9
Short code
VZV strain Islt
Synonyms
VZV strain Islt
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 frequent infections, hair loss, or poor wound healing, or if you have conditions like malabsorption or chronic illness. It may also be part of routine blood work to check overall health.

What to Expect Before the Test

No special preparation is usually needed, but you may be asked to fast for 8–12 hours before the test if it’s drawn from fasting blood. Avoid alcohol for 24 hours before testing.

How the Test Works

A small blood sample is taken from a vein in your arm. The sample is then analyzed to measure zinc levels using a specialized laboratory method.

Possible Results and What They Mean

Low zinc levels may indicate malnutrition, certain medical conditions, or poor absorption of nutrients. High levels can sometimes be due to certain medications or genetic factors. Your results will be compared to standard reference ranges provided by your lab.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance of Zinc Levels

Short name

Zinc Level

Frequently asked questions

What Are Common Causes of Low Zinc Levels?
Low zinc levels can be caused by diet low in zinc (e.g., vegetarian/vegan diets), digestive issues (like Crohn’s disease), chronic illnesses, or certain medications. In infants and children, it may also be linked to prematurity or poor breastfeeding.
What Are Common Causes of High Zinc Levels?
High zinc levels are less common but may result from long-term zinc supplementation, certain liver diseases, or rare genetic disorders. Excessive intake from supplements or contaminated food can also lead to elevated levels.
How Often Should I Get This Test?
Your provider will determine the frequency based on your health status. Routine blood work may include this test every 1–2 years for adults without known deficiencies, but more frequent testing may be needed if you have ongoing health concerns.
  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