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Total Antioxidant Capacity of Plasma

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

This test measures how effectively your blood plasma protects cells from oxidative damage caused by free radicals.

Quick summary

["Your blood’s natural antioxidant defenses may be assessed to identify potential oxidative stress or health risks."]

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

Key facts at a glance

LOINC
10726-8
Short code
T gondii Tiss Ql Gie Stn
Synonyms
T gondii Tiss Ql Gie Stn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
giemsa-stain
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

What Does This Test Measure?

Total antioxidant capacity reflects the combined ability of plasma components—such as vitamins (e.g., vitamin C, E), enzymes, and other molecules—to neutralize harmful free radicals. This helps assess your body’s overall oxidative balance.

Why Might You Need This Test?

Doctors may order this test to evaluate chronic conditions linked to oxidative stress (e.g., cardiovascular disease, diabetes) or to monitor treatments affecting antioxidant levels.

Sample Collection and Preparation

A blood sample is drawn from a vein, typically in the arm. Plasma is separated from blood cells and stored for testing. Avoid alcohol or strenuous activity 24 hours before testing, as they may temporarily alter results.

Common Conditions Monitored

Results may help identify risks for conditions like atherosclerosis, neurodegenerative diseases, or metabolic disorders where oxidative damage plays a role.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical significance: Elevated levels may indicate a strong antioxidant response or reduced oxidative stress, while lower levels could signal increased free radical activity, potentially linked to chronic inflammation or disease progression. Interpretation depends on clinical context and patient history.

Short name

Total Antioxidant Status (Plasma)

Frequently asked questions

What causes my antioxidant capacity test results to vary?
Several factors can influence results, including diet (e.g., high intake of fruits, vegetables, or supplements), hydration status, medications, and recent physical activity. Your healthcare provider will consider these when reviewing your results.
How soon will I receive my results?
Results are typically available within 1–3 business days, depending on lab processing times. Your doctor will discuss findings during your follow-up visit.
Can I fast before this test?
No fasting is required for this test, as it measures plasma components without dietary restrictions. However, always follow your doctor’s specific instructions for your test.
  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