Catalase activity in whole blood (peripheral blood sample)

What Does Catalase Activity Measure?

Catalase is an enzyme found in red blood cells and other tissues that converts hydrogen peroxide into water and oxygen. This test evaluates your blood’s enzymatic capacity to detoxify reactive oxygen species, which can cause cellular damage if left unchecked. Levels may vary based on overall health, genetic factors, and exposure to oxidative stressors.

Why Might Your Doctor Order This Test?

Your doctor may request this test if you have symptoms or conditions linked to oxidative stress, such as chronic fatigue, anemia, or suspected oxidative damage from medications, toxins, or underlying diseases like certain cancers or autoimmune disorders. It can also be part of broader metabolic or blood health evaluations.

How Is This Test Performed?

A small blood sample is drawn from a vein, typically in your arm. The sample is processed to measure catalase activity, often using enzymatic methods that detect its ability to decompose hydrogen peroxide. Results are reported as a catalytic concentration (per unit volume), though exact reference ranges vary by lab.

What Do Results Mean?

Interpretation depends on clinical context. Low catalase activity might suggest impaired detoxification pathways, while high levels could indicate acute oxidative stress or certain metabolic conditions. Your doctor will review results alongside your symptoms and other test findings.