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Guaiacol peroxidase activity (serum/plasma)

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

This test measures the activity of an enzyme called guaiacol peroxidase in your blood. It may be used to assess oxidative stress or certain liver enzyme functions.

Quick summary

["This test helps evaluate enzyme activity linked to oxidative processes in your body."]

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

Key facts at a glance

LOINC
100403-5
Short code
Guineafowl IgG Qn
Synonyms
Guineafowl IgG Qn
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
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

What Does This Test Measure?

Guaiacol peroxidase is an enzyme involved in the breakdown of hydrogen peroxide, a reactive molecule that can cause cellular damage. Measuring its activity can help identify conditions where oxidative stress is present, such as certain liver disorders or metabolic conditions.

Why Might This Test Be Ordered?

Your healthcare provider may order this test if they suspect liver disease, oxidative stress, or other conditions affecting enzyme function. It is sometimes used in conjunction with other tests to monitor metabolic or biochemical processes.

How Is the Sample Collected?

A blood sample is drawn from a vein, usually in your arm. The blood is then separated into serum or plasma for testing.

What Should You Expect Before the Test?

No special preparation is typically required, but you may be asked to avoid certain medications or foods that could interfere with results. Always follow your healthcare provider’s instructions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance: This test can help identify conditions where oxidative enzymes are impaired or overactive, potentially aiding in diagnosing liver disease, metabolic disorders, or other oxidative stress-related conditions. Results may be used alongside other diagnostic tests to guide treatment decisions.

Short name

Guaiacol Peroxidase Activity

Frequently asked questions

What does a high or low guaiacol peroxidase activity mean?
High activity might suggest increased oxidative stress or certain liver conditions, while low activity could indicate enzyme deficiency or impaired metabolic processes. Your results will be interpreted by your healthcare provider in the context of your overall health.
Can diet or medications affect this test?
Some medications or dietary supplements may influence enzyme activity. If you are on medication or have dietary restrictions, inform your healthcare provider before the test to ensure accurate results.
How long will it take to get my results?
Results are typically available within a few days to a couple of weeks, depending on the lab’s processing time and your healthcare provider’s follow-up schedule.
  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