Le site de vulgarisation scientifique de l’Université de Liège. ULg, Université de Liège
free radicals

Molecules often derived from oxygen which possess one or several unpaired electrons and are highly unstable. In the human body, they try to pair their unpaired electrons by taking electrons from the organic molecules which provokes a series of reactions and alterations of the cells, or even their destruction. If the free radicals are too numerous and the reserves of antioxidants are too weak to hinder their action, the result is an imbalance which can provoke the appearance of certain illnesses such as joint or heart problems.

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