Total antioxidant capacity (TAC)

Total antioxidant capacity (TAC) refers to the aggregate ability of all antioxidants present in a sample—such as blood plasma, serum, tissue extracts, food products—to neutralize reactive oxygen species or other oxidants. It does not represent an individual molecule or receptor but rather quantifies the cumulative effect of both enzymatic and nonenzymatic antioxidants present in the system. Commonly measured by various assays such as ORAC (Oxygen Radical Absorbance Capacity), FRAP (Ferric Reducing Ability of Plasma), TEAC/ABTS, and TAP assays, TAC provides an overall index reflecting how well biological fluids or foods can counteract oxidative stress. These methods differ in their chemical principles and may yield different results depending on which types of antioxidants are most prevalent in the sample. The measurement is widely used to assess health status under conditions involving oxidative stress—such as cardiovascular diseases, neurodegenerative disorders, diabetes—and to evaluate food quality. However, TAC itself is not considered a therapeutic target, receptor, enzyme or protein; it is strictly an analytical parameter. Why "is_incorrect" = true: The term "total antioxidant capacity" does not refer to any specific molecule/receptor/protein/enzyme/transporter, nor does it represent something that can be directly targeted by drugs. Instead it describes an aggregate property measured by biochemical assays. Therefore: - It cannot be classified under standard molecular families. - There are no direct interacting drugs. - There are no mechanisms of action relevant to drug targeting. - It serves only as a biomarker for redox balance/oxidative stress. If you require information about specific enzymes involved in antioxidative defense—such as superoxide dismutase or catalase—or about particular small-molecule antioxidants like glutathione or vitamin C/E that contribute to total antioxidant capacity measurements, please specify those targets individually. “Antioxidant capacity is influenced by a wide range of factors... Over the years, several assays purporting to measure total antioxidant power have been reported... The TAP assay quantifies the combined action of all antioxidants present...” “A new method for rapidly determining total antioxidant capacity... quantifies the overall capacity ...to reduce [a redox chromogen].” If you need structured data on actual molecular targets within antioxidative pathways instead—for example "Superoxide dismutase," "Catalase," etc.—please clarify your request.

Other names

Total antioxidant powerTotal antioxidant statusTAP (Total Antioxidant Power)TAS (Total Antioxidant Status)