ORAC Values: Ranking (Oxygen Radical Absorbance Capacity)

ORAC stands for Oxygen Radical Absorbance Capacity. It is a test to quantify the "total antioxidant capacity" (TAC) of a food by placing a sample of the food in a test tube, along with certain molecules that generate free radical activity and certain other molecules that are vulnerable to oxidation .

After a while, they measure how well the sample protected the vulnerable molecules from oxidation by the free radicals. The less free radical damage there is, the higher the antioxidant capacity of the test substance.

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