The<unk> , or<unk> , was a clinical trial conducted with the goal of determining whether<unk>  E and<unk>  supplements could prevent prostate cancer. Enrollment for the trial began in 2001 and ended in 2004. It cost approximately $114 million to conduct and was performed at over 400 different research centers. It was primarily funded by the National Cancer Institute (NCI) and was carried out by SWOG. It was stopped early because the supplements did not show any benefit in<unk> g prostate cancer. Subsequent research based on the trial has generally found that<unk>  and<unk>  E do not prevent prostate cancer. Other research based on foods rich in<unk>  or<unk>  E, not supplements, suggests that there is limited evidence such foods may protect against some forms of cancer. __TOC__
Selenium and Vitamin E Cancer Prevention Trial
European Prospective Investigation into Cancer and Nutrition
Vitamin D and Omega-3 Trial
Polyposis registries
British birth cohort studies
Nutritional epidemiology
Genome-wide association study
Cognitive epidemiology