This is from Dr Malcolm Kendrick’s latest blog:
“The biggest recent study on the impact of diet and heart health was the PURE study. Which was reported thus, last year:
‘Findings from this large, epidemiological cohort study involving 135,335 individuals aged 35 to 70 years from 18 low-, middle- and high-income countries (across North America, Europe, South America, the Middle East, South Asia, China, South East Asia and Africa) suggest that high carbohydrate intake increases total mortality, while high fat intake is associated with a lower risk of total mortality and has no association with the risk of myocardial infarction or cardiovascular disease-related mortality.
Furthermore, a higher saturated fat intake appeared to be associated with a 21% lower risk of stroke. Why might these results be in such contrast with current dietary advice? “The conclusion that low fat intake is protective is based on a few very old studies with questionable methodology,” explains Professor Salim Yusuf (McMaster University, Hamilton, Ontario, Canada), senior investigator for the PURE study. “The problem is that poorly designed studies performed 25–30 years ago were accepted and championed by various health organisations when, in fact, there are several recent studies using better methods, which show that a higher fat intake has a neutral effect,” he continues, citing the example of the Women’s Health Initiative trial conducted by the National Institutes of Health in 49,000 women that showed no benefit of a low-fat diet on heart disease, stroke or cardiovascular disease.’ “