Intermittent fasting has gained popularity as a trendy method for weight loss and maintenance. Also known as time-restricted eating, this practice involves limiting the eating window to set times, typically eight hours within a 24-hour period, with only clear liquids consumed during the remaining 16 hours. Other variations include fasting for two or three days within a week or month.

Prior research has suggested benefits to time restriction, including improved longevity, reduced blood pressure, and weight loss. However, a yearlong study published in April 2022 found no significant benefit over calorie counting for weight loss or improved cardiovascular health.

Recent research has raised concerns about the potential risks of intermittent fasting. A preliminary study presented at a conference of the American Heart Association suggested that following an eight-hour eating window or less was significantly associated with a 91% increased risk of dying from cardiovascular disease, compared with eating over a 12- to 16-hour period.

The study, which analyzed data from 20,000 participants, emphasized the need for a cautious and personalized approach to dietary recommendations, aligning them with an individual’s health status and the latest scientific evidence. The findings underscore the importance of further research to fully understand the potential impact of intermittent fasting on cardiovascular health.