Diet Detective: What is an antioxidant, anyway?
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Believe it or not, oxygen — the very thing you need to survive — can harm you. Think of how the flesh of an apple browns when it’s exposed to air. That’s the effect of oxygen — called oxidation. An antioxidant prevents oxidation. Dipping the cut apple in lemon juice prevents browning. The lemon juice is an antioxidant. Oxidative stress occurs when someone has too many free radicals in his or her body and not enough antioxidants to combat them.
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