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Zinc concentration in serum/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.

Quick summary

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

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

Key facts at a glance

LOINC
76651-9
Short code
ZnT8 Ab SerPl IA-aCnc
Synonyms
ZnT8 Ab SerPl IA-aCnc
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
ia
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 affect immune function, wound healing, and taste perception. They might also evaluate zinc levels if you have symptoms like hair loss, frequent infections, or unusual fatigue, or if you’re taking certain medications that can alter zinc absorption.

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 involves a fasting sample. Bring any medications you’re currently taking to your appointment.

During the Test

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but the procedure is quick and typically painless. The blood sample is then sent to a lab for analysis.

After the Test

You can resume your normal activities immediately. There may be mild bruising or soreness at the injection site, but this usually fades within a day or two. If you experience excessive bleeding or unusual pain, contact your provider.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Zinc Level

Frequently asked questions

How long does it take to get results?
Results are typically available within 1–3 business days, depending on lab processing times. Your provider will discuss the results with you during your follow-up visit.
What causes zinc deficiency?
Zinc deficiency can result from poor diet (low intake of zinc-rich foods like meat, nuts, and seeds), digestive issues that reduce absorption, chronic illnesses, or certain medications. Symptoms may include weakness, hair loss, or immune problems.
Can zinc supplements replace a blood test?
No. Blood tests provide precise measurements of your zinc levels, while supplements can only provide temporary zinc intake. Always follow your provider’s guidance on supplementation.
  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