Total Antioxidant Capacity of Plasma (ORAC-like measurement)

What Does This Test Measure?

This test evaluates the combined capacity of various antioxidants in your plasma to neutralize free radicals. Free radicals are unstable molecules that can cause cellular damage if not neutralized, potentially contributing to chronic diseases like heart disease or aging. The test typically uses a standardized method to quantify how effectively plasma can scavenge these harmful particles over time.

Why Might You Need This Test?

Your healthcare provider may order this test if you have symptoms or conditions linked to oxidative stress, such as chronic inflammation, certain cancers, or metabolic disorders. It may also be used in research or clinical trials studying antioxidant therapies.

How Is the Test Performed?

A blood sample is drawn from a vein, usually in your arm. The plasma portion is separated and analyzed using a method that measures its ability to neutralize free radicals, often involving a controlled reaction with known standards.

What Are Common Uses?

This test isn’t routinely ordered for general health screening but may be part of specialized evaluations for conditions where oxidative damage is suspected. It can also help monitor responses to antioxidant supplements or therapies.