Free radical

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A free radical is a molecule with an unpaired electron.[1] The molecule is reactive and seeks another electron to pair. [2] Free radicals are involved in the mechanisms of damage associated with disease development.[2] Examples are hydrogen peroxide, hypochlorite, nitric oxide and nitrogen dioxide. [1]

The need for antioxidants in peoples’ daily life is becoming more critical with increased exposure to free radicals.[3] Pollution, cigarette smoke, drugs, illness[source?] and stress can increase our exposure.

References[change | change source]

  1. 1.0 1.1 Afzal, M., Armstrong, D. (2002). “Fractionation of herbal medicine for identifying antioxidant activity”. In: Armstrong, D. (Ed.) Methods in Molecular Biology, vol. 186: Oxidative Stress Biomarkers and Antioxidant Protocols, Humana Press Inc.
  2. 2.0 2.1 Rice-Evans, C. (1999). “Screening of phenolics and flavonoids for antioxidant activity”. In: Antioxidant Food Supplements in Human Health. Academic Press, p. 239–253.
  3. Percival, M. (1998). “Antioxidants”. Clinical Nutrition Insights 1/96 Rev. 10/98.