Total Antioxidant Capacity of Serum (ORAC-like measurement)

What Does This Test Measure?

Total antioxidant capacity (TAS) evaluates the combined effect of various antioxidants in your serum, including vitamins (like vitamin C and E), enzymes, and other molecules that help prevent damage from free radicals. This test does not measure individual antioxidants but provides a summary of your blood’s antioxidant power.

Why Might You Need This Test?

Doctors may order this test to evaluate oxidative stress, monitor chronic conditions like diabetes or heart disease, or assess nutritional status (e.g., vitamin deficiencies). It can also help identify risks for conditions linked to oxidative damage, such as certain cancers or neurodegenerative diseases.

How Is the Test Performed?

A blood sample is drawn from a vein, typically in your arm. The serum portion is then analyzed using a specialized method to measure its antioxidant capacity. Results are reported as a general measure of oxidative protection, not specific values for individual antioxidants.

What Are Common Uses?

This test is often used in research or specialized clinical settings to support broader health assessments, particularly in studies focused on aging, inflammation, or metabolic health. It may complement other tests like vitamin levels or markers of oxidative damage.