Yet another important reason to get enough rest: According to new research, people who have difficulty sleeping are twice as likely to develop prostate cancer than sound sleepers. The five-year study, reported in Cancer Epidemiology, Biomarkers & Prevention, found more than a three-fold increase in risk for advanced prostate cancer associated with “very severe” sleep problems. “Sleep may be a potential [means of] intervention to reduce the risk of prostate cancer,” says Lara G. Sigurdardóttir, M.D., of the University of Iceland.

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