The same omega 3 fatty acids that reduce inflammation and are believed to improve heart health may be bad news for your prostate. That's the suggestion from research conducted at the Fred Hutchinson Cancer Research Center in Seattle, that looked at blood percentages of the fatty acid docosahexaenoic acid(DHA) and the incidence of aggressive prostate cancer in 3400 men. US News & World Report reports that the men with the highest levels of DHA were two-and-a-half times more likely to develop aggressive prostate cancer than those with the lowest DHA levels.