Intermittent fasting, better known as time-restricted eating, asks people to eat all their food inside a fixed daily window. A new U.S. analysis of about 20 000 adults followed for up to 17 years finds that those who squeezed every meal into fewer than eight hours a day were 91 percent more likely to die from cardiovascular causes than people who spread eating over 12 to 16 hours.
Among participants who already had heart disease, even an eight- to ten-hour eating window was tied to a 66 percent higher risk of dying from heart disease or stroke. Overall longevity did not improve with shorter eating periods, and a longer window (over 16 hours) appeared safer for people living with cancer.
Because the findings come from an abstract presented at an American Heart Association conference, not yet peer-reviewed, researchers stress that the results show correlation, not proof of cause. They recommend that anyone considering intermittent fasting discuss it with a clinician and tailor meal timing to personal health conditions rather than following a one-size-fits-all trend.
8-hour time-restricted eating linked to a 91% higher risk of cardiovascular death (American Heart Association press release, March 18 2024)
Preliminary analysis of NHANES data shows adults who confine eating to fewer than eight hours daily have a sharply higher risk of cardiovascular mortality, especially those with existing heart disease or cancer. The authors call for cautious, personalised dietary advice until peer-reviewed results are available.
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