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Apples extend lifespan by 10 per cent, study finds

Published by Guardian on Thu, 10 Mar 2011


SCIENTISTS are reporting the first evidence that consumption of a healthful antioxidant substance in apples extends the average lifespan of test animals, and does so by 10 per cent. The new results, obtained with fruit flies   stand-ins for humans in hundreds of research projects each year  bolster similar findings on apple antioxidants in other animal tests.The study appears in ACSs Journal of Agricultural and Food Chemistry.Zhen-Yu Chen and colleagues note that damaging substances generated in the body, termed free radicals, cause undesirable changes believed to be involved in the aging process and some diseases. Substances known as antioxidants can combat this damage.Fruits and vegetables in the diet, especially brightly coloured foods like tomatoes, broccoli, blueberries, and apples are excellent sources of antioxidants. A previous study with other test animals hinted that an apple antioxidant could extend average lifespan. In the current report, the researchers studied whether different apple antioxidants, known as polyphenols, could do the same thing in fruit flies.The researchers found that apple polyphenols not only prolonged the average lifespan of fruit flies but also helped preserve their ability to walk, climb and move about. In addition, apple polyphenols reversed the levels of various biochemical substances found in older fruit flies and used as markers for age-related deterioration and approaching death.Chen and colleagues note that the results support those from other studies, including one in which women who often ate apples had a 13-22 per cent decrease in the risk of heart disease, and polish the apples popular culture image as a healthy food.
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