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The use of vitamin supplements for prevention of chronic diseases market moves a multimillionaire. The problem is the lack of consistency of scientific evidence that studying this fact.
The theoretical basis for supplementation is the antioxidant action of vitamins, thereby reducing the occurrence of malignant tumors. On January 7 edition of the journal of American Medical Association, two papers diminish the hope that this occurs. Researchers from the Universities of Harvard and the MD Anderson Cancer Center failed to demonstrate that using vitamin E, vitamin C and selenium can prevent cancer and, more specifically, the prostate cancer.
The first study followed more than 35 thousand men over 50 years the United States, Canada and Puerto Rico. Participants were followed for five years, on average, in more than 420 research centers in the three countries. In this research the effect of selenium and vitamin E on the tumors in general and cancer of the prostate.
The results were disappointing: the selenium and vitamin E decreased the occurrence of non-malignant tumors. In the group of vitamin E the researchers found an increase, not significant from statistical point of view, cases of cancer of the prostate.
The second study specifically the prevention of prostate cancer through supplements of vitamins C and E. The research studied men aged over 50 who were enrolled in the Health Study II of Physicians. After eight years of follow-up, again the results did not support the vitamin supplementation. Use 400 International Units of vitamin E on alternate days and 500 mg vitamin C daily did not help to prevent the occurrence of malignant tumors.
Neither of the two compounds reduced the number of cases of prostate cancer or other places of the human body. The results of the research relate only to tumors studied. The beneficial effects of vitamins on other diseases are still under study.
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This article was translated by an automatic translation system, and was therefore not reviewed by people.