What is an Antioxidant?
An antioxidant is a molecule that neutralises free radicals, unstable molecules that can damage cells, by donating an electron to them without becoming destructive itself. In nutrition the word covers vitamins, minerals and plant compounds that help limit this kind of cellular wear.
Antioxidants are the counterweight to oxidative stress, the imbalance that builds when free radicals outpace the body's own defences. They are not a single ingredient but a role that many compounds can play, which is why plant molecules such as quercetin and resveratrol are studied for antioxidant activity rather than sold as a single vitamin.
Antioxidant support appeals to people focused on long-term cellular health and healthy ageing. The catch is that more is not better: the body runs its own antioxidant systems, and very high doses of isolated antioxidants can blunt useful adaptations, including some of the benefits your body earns from exercise. A varied diet tends to serve you better than megadoses of any one compound.
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Frequently asked questions
How is it different from oxidative stress?
Oxidative stress is the problem, an excess of reactive molecules damaging cells. An antioxidant is one part of the response, a molecule that absorbs that reactivity before it does harm.
Who uses it, or when is it the right choice?
People thinking about long-term health and ageing often want antioxidant-rich foods and supplements. They make most sense as part of a broad diet rather than as a single high-dose pill.
When is it the WRONG choice?
Loading up on isolated high-dose antioxidants around training can dampen the adaptations you are exercising to gain. They are also the wrong focus if the real issue is a diet lacking whole foods.