Total Antioxidant Capacity of Serum (or Plasma) – Total Radical Scavenging Activity

What Does This Test Measure?

This test evaluates the combined activity of various antioxidants in your blood, including vitamins (like vitamin C and E), enzymes, and other molecules that help prevent damage from unstable molecules called free radicals. The result reflects your blood’s overall capacity to neutralize these harmful substances.

Why Might You Need This Test?

Doctors may order this test to assess oxidative stress, evaluate chronic conditions like diabetes or heart disease, or monitor responses to treatments that increase oxidative burden (e.g., certain medications or lifestyle factors). It can also help identify early signs of oxidative damage in conditions like aging or metabolic disorders.

What Does a Low or High Result Mean?

A lower-than-expected result might suggest insufficient antioxidant protection, which could be linked to chronic inflammation, poor diet, or certain health conditions. A higher-than-expected result may indicate overcompensation by antioxidants but isn’t always clinically significant without further context.

Common Conditions Monitored With This Test

While not a diagnostic test for specific diseases, it’s sometimes used alongside other blood tests to monitor conditions like cardiovascular disease, diabetes, or neurodegenerative disorders where oxidative stress plays a role.