Only eating within an 8-hour window is associated with a significantly higher risk of heart disease-related death compared with eating over 12 to 16 hours
Restricting your eating window to just 8 hours a day, a popular type of intermittent fasting, has been linked to a higher risk of dying from heart disease. But some scientists argue that people with pre-existing health conditions may unknowingly opt for intermittent fasting if their symptoms or treatments affect their appetite and the quality of our diet is probably more important than when we eat.
Over an average follow-up period of eight years, the team found that those who ate during an 8-hour daily window didn’t live longer than those with a more traditional eating schedule of 12 to 16 hours, despite intermittent fasting often being lauded for its longevity benefits.
The study – presented at the American Heart Association Epidemiology and Prevention conference in Chicago – doesn’t prove that time-restricted eating caused any of these deaths, says Zhong.at the Intermountain Heart Institute in Salt Lake City, Utah. Some might have adopted this pattern intentionally, while others could have had limited eating windows due to health conditions or treatments that affected their appetite, he says.
In their paper, the authors acknowledge their research relied on self-reported dietary information that may be inaccurate. They plan to investigate if the findings apply to people of a broader range of ethnicities and how fasting might increase the risk of harmful People who want to reduce their likelihood of dying prematurely “should aim for an overall heart-healthy dietary pattern, regardless of the time of day they eat”, says Carson. Those who wish to start intermittent fasting should speak to their doctor beforehand, says Horne.
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