Study: Hype around Intermittent Fasting Not Warranted - Intermittent fasting fails to outperform traditional diets for weight loss, study finds
A new review suggests intermittent fasting may not offer a clear advantage over traditional diets for weight loss. Researchers analysed 22 studies involving nearly 2,000 participants worldwide. The findings challenge the idea that fasting methods are inherently more effective for shedding excess weight.
The study, led by Luis Garegnani from Universidad Hospital Italiano in Buenos Aires, examined popular fasting approaches like the 8:16, 5:2, and alternate-day methods. These results align with earlier research showing no significant difference in outcomes between fasting and standard diets.
The review covered a wide range of fasting techniques, including the 8:16 method (eating within an 8-hour window and fasting for 16), the 5:2 approach (five normal days with two fasting days), and alternate-day fasting. Despite the variety, none showed a clear edge over conventional calorie restriction for weight loss.
Most studies lasted less than two years, leaving long-term effects unclear. Participants with overweight or obesity lost similar amounts of weight regardless of whether they fasted or followed other diets. The review also noted no meaningful improvement in quality of life from fasting compared to other methods.
These findings match previous meta-analyses that found no particular benefit of intermittent fasting. With global obesity rates rising—2.5 billion people overweight and 890 million obese in 2022—experts still emphasise weight loss as a key strategy for reducing health risks. Yet the choice of diet may come down to personal preference rather than proven superiority.
Researchers recommend consulting healthcare professionals before starting any weight-loss plan. This ensures the method suits individual health needs and lifestyle, whether fasting or another approach.
The review reinforces that intermittent fasting does not outperform traditional diets for weight loss. With limited long-term data, its benefits remain uncertain beyond short-term studies.
For those aiming to lose weight, the best method may simply be the one they can maintain. Medical guidance remains important for safe and effective results.
