Oxidative stress occurs when cells becomes damages from the we eat. In fact, a testing procedure exists that measures Oxygen Radical Absorbance Capacity or ORAC. This is a measurement that measures antioxidant capacity of foods. ORAC measures how many free radicals a specific food can absorb and deactivate The higher the ORAC score the more oxygen radicals a food absorbs. That is a good things since you now know how much ORAC units foods can absorb and keep you health. Cherry juice, for example delivers 13,000 ORAC units per 100 grams. This a excellent to know since it is very simply mix up some cherry juice and enjoy daily.