LYCOS RETRIEVER 
Vitamins: Diseases
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A few weeks later an article appeared in the Lancet which confirmed Funk's theories about vitamins and their relation to specific diseases. A German explorer in New Guinea had successfully prevented beriberi among the members of his expedition by eating a thick soup of red rice and Katjang idjoe beans cooked together every day.
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[M]ore than 80 percent believe vitamins can help prevent a number of diseases, including heart disease, cancer, diabetes and birth defects. Those are just two of the findings from the latest bi-annual survey of 1,000 Canadians commissioned by the Vitamin Information Service.
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The most obvious source of conflicting findings is the fact that different studies test different doses of vitamins, for different lengths of time. Take vitamin D as an example. Studies have found that it protects against fractures at doses of 700-800 IU a day,(33) but that 400 IU a day has less benefit.(60) A short vitamin supplement trial may not show any benefit simply because it takes a long time for a disease to develop or for the vitamin's protective effects to emerge.
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