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RDA Of Vitamin C Could Be Doubled Safely For Optimum Health Benefit

July 18, 2012: 12:00 AM EST
Medical experts who determine the recommended daily allowance (RDA) of vitamin C are using inappropriate evaluation techniques to come up with faulty conclusions, according to a U.S. review of recent scientific literature. Specifically, the researchers found, the RDA of vitamin C could be doubled – to an optimum 200 mg a day, instead of 75 to 90 mg – to safely saturate cells and tissues for the greatest possible health benefit, they said. The problem is that medical experts insist on evaluating vitamin C in the same way they do pharmaceutical drugs, using phase 3 randomized placebo-controlled trials. This “almost insures they will find no beneficial effect,” the researchers said. “We need to get past that.”
Balz Frei et al., "Authors' Perspective: What is the Optimum Intake of Vitamin C in Humans?", Critical Reviews in Food Science and Nutrition, July 18, 2012, © Informa plc
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