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Zinc, Serum Concentration

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

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

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
34387-1
Short code
Zinc Ur-sCnc
Synonyms
Zinc Ur-sCnc
Category
chemistry
Sample
urine
Container
Sterile urine container
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Specimen volume
10 mL
Stability
Room temperature: 2h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
0
Lipemia max
0
Icterus max
0
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 fatigue, hair loss, or weakened immunity) or excess zinc (which may affect copper absorption or cause nausea). It’s also used in research or specialized conditions like chronic kidney disease or malabsorption disorders.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from your arm. If you’re on a blood thinner, let your doctor know to avoid unnecessary bleeding.

What the Results Mean

Results are compared to a general reference range, but individual needs vary. Low zinc may indicate poor nutrition or disease, while very high levels could signal medication use or rare conditions.

Common Conditions Linked to Zinc Levels

Low zinc is often seen in chronic illnesses, poor diet, or digestive disorders. High zinc can occur with long-term supplements or certain medications. Your doctor will interpret results in context of your health.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Zinc levels may affect immune function, wound healing, and taste perception. Doctors monitor them in patients with malnutrition, kidney disease, or those taking zinc supplements.

Short name

Zinc Level

Frequently asked questions

What causes zinc levels to be low?
Zinc deficiency can result from poor diet (low intake of foods like meat, shellfish, or fortified grains), digestive issues (like Crohn’s disease), or certain medications that interfere with absorption.
What are the symptoms of low zinc?
Symptoms may include frequent infections, slow wound healing, hair loss, weakened immunity, or changes in taste. Some people experience fatigue or skin problems.
How can I support healthy zinc levels?
Eat zinc-rich foods (nuts, seeds, seafood, legumes) and consult your doctor if you suspect deficiency. Avoid excessive zinc supplements unless advised, as they can cause toxicity.
  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