Vitamin E, beta-carotene may protect smokers from prostate cancer

Daily supplements of vitamin E and beta-carotene may reduce the risk of prostate cancer in smokers, but not non-smokers, reports a new study, adding more contradictory results to an already confused field. A diet rich in antioxidants like vitamins C and E, and beta-carotene has been reported to protect certain sub-populations, particularly smokers, against prostate cancer, a disease that is becoming more common, with incidence rates haven risen by almost two per cent over 15 years. ?Vitamin E supplementation in smokers and beta-carotene supplementation in men with low dietary beta-carotene were associated with reduced risks of this disease,? wrote lead author Victoria Kirsh from US National Cancer Institute. The Prostate, Lung, Colorectal, and Ovarian (PLCO) Cancer Screening Trial, published in the Journal of the National Cancer Institute (Vol. 98, pp. 245-254), surveyed the diet and supplement use of 29,361 men with an average age of 63, and with an average follow-up time of 4.2 years. Dietary information was collected by a self-administered 137-item food frequency questionnaire (FFQ) that assessed the volunteer?s diet over the previous year. However, current and recent-former smokers taking 400 IU or more vitamin E daily were 71 per cent less likely to develop prostate cancer than those who took no vitamin E. Differing vitamin C intake, dietary and supplemental, was reported to have no effect on any of the sub-populations. ?Our cohort findings do not provide strong support for population-wide implementation of high-dose antioxidant supplementation for the prevention of prostate cancer. They do suggest, however, that in certain population subgroups there was an association between supplement intake and reduced risks of prostate cancer,? concluded Kirsh. These results agree with those of the Alpha-Tocopherol, Beta-Carotene Cancer Prevention (ATBC) study (1998), which reported that smokers who received 50 micrograms of vitamin E had a lower incidence of prostate cancer than the non-supplemented group.
Category: Productos

Source: NutraIngredients