Bad news for the countless health fanatics who take vitamin C: in high doses
it may clog up arteries, the American Heart Association meeting in San Diego
heard last week. A study of 573 seemingly healthy middle-aged men and women
found that those taking 500 milligrams of vitamin C supplement per day, the
equivalent of 10 oranges, had 2.5 times as much thickening of their arteries as
people who took no supplements. Among smokers thickening rose fivefold. James
Dwyer from the University of Southern California, who led the study, suggests
avoiding very high doses of vitamins.
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