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Serum/plasma mass concentration of zinc (total)

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 helps support immunity, wound healing, and metabolism—low levels may signal nutritional needs or health concerns."]

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

Key facts at a glance

LOINC
73529-0
Short code
AM+BZ ind plt IgM SerPl Ql FC
Synonyms
AM+BZ ind plt IgM SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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, evaluate symptoms like hair loss, frequent infections, or poor wound healing, or monitor conditions like malabsorption (e.g., celiac disease) or chronic kidney disease. It can also help assess nutritional status or guide treatment for certain metabolic disorders.

What to Expect Before the Test

No special preparation is needed. You may fast for 8–12 hours before the test if instructed, but your provider will confirm. Bring any medications or supplements you take regularly, as they may affect results.

What Happens During the Test?

A healthcare professional will draw blood from a vein in your arm. You may feel a slight pinch, but it usually takes only a few minutes. The blood sample is then sent to a lab for analysis.

What Are Possible Results?

Results are compared to a general reference range, but exact values can vary by lab. Low zinc levels may indicate dietary deficiencies, gastrointestinal issues, or certain medical conditions, while high levels could signal kidney disease or exposure to heavy metals.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Zinc Level

Frequently asked questions

What does a low zinc level mean?
Low zinc levels may suggest poor nutrition, digestive problems (e.g., Crohn’s disease), or conditions like diabetes or liver disease. It can also be a side effect of certain medications. Your provider may recommend dietary changes, supplements, or further testing to identify the cause.
What does a high zinc level mean?
High zinc levels can occur with chronic kidney disease, certain medications, or excessive intake. They may also signal copper deficiency (since zinc and copper compete in the body). Your provider will review your symptoms and other test results to determine next steps.
How often should I get this test?
This test is typically ordered as needed, depending on your symptoms or medical condition. Your provider will decide how often to repeat it, if at all. Regular monitoring may be recommended for people with chronic illnesses or those 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