Oxidative stress marker (serum/plasma concentration) – Total Antioxidant Capacity

What Does This Test Measure?

Total antioxidant capacity reflects the combined activity of various antioxidants in your blood, such as vitamins (like vitamin C and E), enzymes, and other molecules that neutralize free radicals. Free radicals are unstable molecules that can damage cells and contribute to aging and disease. This test provides a snapshot of your body’s natural defense against oxidative stress.

Why Might You Need This Test?

Doctors may order this test if you have or are at risk for conditions linked to oxidative stress, such as chronic inflammation, cardiovascular disease, certain cancers, or metabolic disorders. It can also be used to monitor treatment responses or assess overall health in patients with long-term conditions.

How Is the Test Performed?

A small blood sample is drawn from a vein, usually in your arm. The sample is then analyzed in a lab to measure the total antioxidant capacity. The results are typically reported as a concentration value, though exact reference ranges can vary by lab.

What Are Common Uses?

This test is often used as part of broader health assessments, especially in research or specialized clinical settings. It may help identify individuals with elevated oxidative stress, track changes over time, or guide management of certain health conditions.