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Zinc mass concentration in serum or plasma

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

This test measures the amount of zinc, a mineral essential for many bodily functions, in your blood. Zinc supports immune health, wound healing, and proper taste and smell.

Quick summary

["Zinc helps your body stay healthy, but low or high levels may signal underlying health concerns."]

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

Key facts at a glance

LOINC
9487-0
Short code
Zinc Wat-mCnc
Synonyms
Zinc Wat-mCnc
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 healthcare provider may order this test to check for zinc deficiency, which can cause symptoms like fatigue, hair loss, or weakened immunity. They might also evaluate zinc levels if you have conditions like chronic diarrhea, malabsorption, or certain infections. Rarely, high zinc levels could be investigated if symptoms like nausea or copper deficiency arise.

What to Expect Before the Test

No special preparation is needed, but you may be asked to fast for 8–12 hours before the draw if your lab requires it. Wear a comfortable shirt for easy access to your vein. If you’re on blood thinners or have a history of bleeding disorders, let your provider know.

What Happens During the Test?

A healthcare professional will insert a small needle into your arm to draw blood. The process takes about 5 minutes, and you may feel a brief pinch. The sample is then sent to the lab for analysis.

What Are Possible Results?

Results are reported as the mass concentration of zinc in your blood, measured in micrograms per deciliter (µg/dL). Your provider will interpret the result in relation to your health and symptoms.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Zinc Level

Frequently asked questions

What does a low zinc level mean?
A low zinc level may suggest poor absorption, chronic illness, or dietary deficiencies. Common symptoms include fatigue, weakened immunity, hair loss, or delayed wound healing. Your provider may recommend dietary changes, supplements, or further testing.
What causes high zinc levels?
Excessive zinc intake from supplements or medications, kidney disease, or rare genetic disorders can lead to high levels. Symptoms may include nausea, copper deficiency, or skin reactions. Your provider will investigate the cause and adjust treatment if needed.
How often should I get this test?
Your provider will determine frequency based on your health status. Routine checks may occur if you have chronic conditions like diabetes or kidney disease, or if you’re taking zinc supplements long-term.
  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