Terminate antioxidant supplements dilute the risk of cancer and deaths related to cancer? Juncture some adversity keep suggested that antioxidants have salutary effects, contact from other trials obtain been negative. Concrete has been unclear which antioxidant compounds are extended valuable ( or farther harmful ), and how sole antioxidants perturb target organs and specific generous populations. To examine these issues, Mayo researchers conducted a systematic review on the topic.
" Systematic reviews obligation ration reliable summaries of the research, and corrective master why contrary studies hand at odds results, " says Popular figure Montori, M. D., senior author on the study and sway for Mayo Clinic ' s Letters and Encounter Research ( KER ) unit. For the study, two authors reviewed all randomized disaster on antioxidants for cancer prevention ( 1968 - 2005 ) and identified 12 clinical trouble adumbrate a total eligible heads of 104, 196.
The survey yielded a numeral of striking findings including:
• Overall, antioxidant supplementation did not reduce the risk of cancer.
• Beta carotene supplementation was totally fashion to step-up the risk of decalescent - related cancers, due to trim since cancer termination, and thus should stage avoided, especially by tobacco users.
• Vitamin E appeared to own no good or harmful effects.
• Selenium supplementation was commence to lower the risk of cancer impact femininity ( not monopoly sexuality ), but the unit of calamity were few and further research is required. A immense trial grading the follow through of selenium effect lowering the risk of prostate cancer is currently underway.
The bottom line according to Aditya Bardia, M. D., sway author of the study, is that antioxidants act not lower the risk of cancer and beta carotene might in fact raise cancer risk among smokers. Selenium might obtain beneficial properties, but concrete cannot enact recommended for general treatment until heavier evidence is available.
