Men and women in the top one-fifth for consuming the most polyunsaturated fat were 19% less likely to die over the next 26-32 years compared to the one-fifth of men and women consuming the least according to a study from researchers at Harvard University in Boston, Massachusetts, USA.

Replacing 5% of energy from saturated fat with polyunsaturated fat was associated with a 27% lower risk of death in men and women over the next 22-26 years according to a study from researchers at Harvard University in Boston, Massachusetts, USA.

Fat intake is not associated with an increased risk of prostate cancer according to a 2015 review of the research.

Saturated fat intake was not.

Polyunsaturated fat was not.

Monounsaturated fat was not.

And total fat intake was not.

The same was true for advanced stage prostate cancer (with slightly different relative risks than those shown below).

“Current published cohort studies suggest no association between total fat, saturated fat, or unsaturated fat intake and the risk for [prostate cancer],” the authors of the paper concluded.

The article was previously published on August 7, 2015.

Men who had experienced a recent coronary event and were told to replace dietary saturated fats (from animal fats, common margarines, and shortenings) with omega-6 polyunsaturated fat linoleic acid (from safflower oil and safflower oil polyunsaturated margarine) were 62% MORE likely to die—1.62 times more likely to die—over the next 5 years compared to men who were not given any dietary advice according to a recent analysis of an old study called The Sydney Diet Heart Study, a randomized controlled trial conducted from 1966 to 1973.

After five years, 17.6% of the men in the intervention group had died versus 11.8% in the control group.

The analysis was done by researchers at the US National Institutes of Health.