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Zinc, Serum Concentration (Mass Concentration)

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

This test measures the amount of zinc in your blood serum. Zinc is an essential mineral that plays a role in many bodily functions, including immune support and metabolism.

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
109226-1
Short code
Zinc Msmt Smn
Synonyms
Zinc Msmt Smn
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, slow wound healing, hair loss, or fatigue. It may also be checked during pregnancy, in people with chronic illnesses, or those with dietary zinc deficiencies.

What to Expect Before the Test

No special preparation is usually needed. You may be asked to fast for 8–12 hours before the test if it’s part of a broader metabolic panel, but this isn’t always required for a standalone zinc test. Bring any medications you’re currently taking.

What Happens During the Test?

A healthcare professional will draw blood from a vein in your arm. The process is quick and typically causes only mild discomfort. The blood sample is then sent to a lab for analysis.

What Are Possible Results?

Results are reported as a concentration value (e.g., micrograms per deciliter, µg/dL). While reference ranges can vary by lab, low levels may indicate deficiency, and high levels could suggest liver disease or certain medications.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Zinc Level

Frequently asked questions

How often is this test ordered?
This test is often part of a routine blood panel or ordered specifically if symptoms or risk factors (like malnutrition or chronic illness) suggest zinc deficiency.
Can zinc levels change with diet?
Yes, zinc intake from food (meat, shellfish, nuts) or supplements can affect results. Avoid high-zinc supplements or foods 24 hours before testing if possible.
What if my results are outside the normal range?
If your results are low, your provider may recommend dietary adjustments, supplements, or further testing. If high, they may investigate potential causes like liver disease or medication use.
  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