Fish oil cuts heart attack risk, vitamin D lowers odds of cancer death

Neither vitamin D nor fish oil lowered the odds of stroke or of getting cancer in the first place in the trial, whose participants did not know whether they were taking the real supplements or a dummy pill. The heart attack rate in fish oil recipients was 28 percent lower than among those who got the dummy pill, or placebo, and it was 77 percent lower among African American participants - although the lead author of the study told Reuters Health that this dramatic drop in risk among black participants needs to be confirmed. For people taking vitamin D who developed cancer, the death rate from cancer was 25 percent lower, possibly because the vitamin "may affect the biology of the tumor so it's less likely to spread and become metastatic," said lead author Dr. JoAnn Manson, chief of the division of preventive medicine at Brigham and Women's Hospital in Boston.

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