Study: Hype around Intermittent Fasting Not Warranted - Intermittent fasting fails to outperform traditional diets for weight loss, major review finds

A new review has found that intermittent fasting offers no clear advantage over traditional diets for weight loss. Researchers analysed 22 studies involving nearly 2,000 participants worldwide. The findings challenge the growing popularity of fasting as a superior method for shedding excess weight.

The study, led by Garegnani and colleagues, examined three common fasting approaches: the 8:16 method, the 5:2 method, and Alternate Day Fasting (ADF). However, the review did not specify which variant was most frequently used in the analysed studies. Results showed no significant difference in weight loss between fasting and other dietary methods.

Previous meta-analyses had already suggested that intermittent fasting was no more effective than standard diets. This latest review reinforces those conclusions. Participants across the 22 studies experienced similar weight loss regardless of whether they fasted or followed conventional eating patterns.

The research also found no improvement in quality of life for those using intermittent fasting compared to other diets. Despite its widespread promotion, the evidence remains uncertain due to variations in study methods and limitations in the data. Around 2.5 billion people globally were overweight in 2022, with 890 million classified as obese, making weight loss a critical health priority.

The review suggests that intermittent fasting may be a suitable option for some, but it is not inherently better than other diets. Anyone aiming to lose weight should select a method that fits their lifestyle, preferably under medical guidance. The findings highlight the need for further research before strong recommendations can be made.