Antioxidant
An antioxidant is a molecule that can slow or stop the oxidation, or electron transfer, of other molecules.
Antioxidants can be found in food.
Antioxidants are molecules that relieve oxidative stress by preventing the formation and oxidation of free radicals.[1] Antioxidants donate one of their electrons or hydrogen to free radicals, stopping their chain reaction.[2] Found in our diet (for example, in vitamins) or formed inside our body (like enzymes), antioxidants can protect us from the damaging effects of free radicals.[3]
The best way to combat free radicals is to have a diet of fresh fruits and vegetables, red wine, and green tea.[2][4] These functional foods are rich in phytochemicals with antioxidant properties. Health supplements enriched with antioxidants are also now widely available.
Antioxidant Media
Structure of the antioxidant glutathione
Substituted phenols and derivatives of phenylenediamine are common antioxidants used to inhibit gum formation in gasoline (petrol).
The structure of the antioxidant vitamin ascorbic acid (vitamin C)
The free radical mechanism of lipid peroxidation
Decameric structure of AhpC, a bacterial 2-cysteine peroxiredoxin from Salmonella typhimurium
Structure of the metal chelator phytic acid
Fruits and vegetables are good sources of antioxidant vitamins C and E.
References
- 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.[3]
- Halliwell, B., Aeschbach, R., Loliger, J., Aruoma, O.I. (1995). ”The characterization of antioxidant”. Food and Chemical Toxicology 33(7): 601–617.[1]
- Kaur, C., Kapoor, H. (2001). “Review: antioxidants in fruits and vegetables – the millennium’s health”. International Journal of Food Science and Technology 36: 703–725.[2]
- Percival, M. (1998). “Antioxidants”. Clinical Nutrition Insights 1/96 Rev. 10/98. http://acudoc.com/Antioxidants.PDF[4]
- ↑ 1.0 1.1 Halliwell, B., Aeschbach, R., Loliger, J., Aruoma, O.I. (1995). ”The characterization of antioxidant”. Food and Chemical Toxicology 33(7): 601–617.
- ↑ 2.0 2.1 2.2 Kaur, C., Kapoor, H. (2001). “Review: antioxidants in fruits and vegetables – the millennium’s health”. International Journal of Food Science and Technology 36: 703–725.
- ↑ 3.0 3.1 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.
- ↑ 4.0 4.1 Percival, M. (1998). “Antioxidants”. Clinical Nutrition Insights 1/96 Rev. 10/98. http://acudoc.com/Antioxidants.PDF
