A five-year, double-blind, placebo-controlled study of 12,513 people found that fish oil supplements had no significant impact on the time to death or hospital admissions due to cardiovascular disease, although study participants who took fish oil experienced fewer hospital admissions for heart failure. Women as a subgroup had fewer cardiovascular-related hospital admissions when taking the supplements, according to the Italian Risk and Prevention Study, which looked at patients with multiple risk factors for cardiovascular disease. While fish oil supplements "are not a panacea ... some studies suggest a benefit," said James Stein, a cardiovascular-prevention expert.

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