Study: Hype around Intermittent Fasting Not Warranted - New review reveals intermittent fasting may not outperform traditional diets for weight loss

Over 2.5 billion people worldwide were overweight in 2022, with 890 million classified as obese. Finding effective ways to lose weight remains a key health priority, as excess weight raises risks for serious conditions like diabetes and heart disease. A recent review has now examined whether intermittent fasting offers a better solution than traditional diets.

A Cochrane review analysed studies comparing intermittent fasting to other weight-loss methods. The findings showed no clear advantage—or only a very slight one—for fasting over conventional diets. Many studies had weaknesses, such as small participant groups and short durations, with almost no research lasting beyond two years.

The review also highlighted the difficulty of comparing results due to the many different fasting approaches. Some studies tracked quality of life but found no noticeable improvement from intermittent fasting. Experts stress that long-term success depends on choosing a method that people can maintain over time.

Despite the popularity of intermittent fasting, the overall evidence remains uncertain. Researchers noted that variations in fasting methods and study designs make it hard to draw firm conclusions. For now, weight loss itself—regardless of the method—stays the most important factor in reducing health risks linked to obesity.

The review suggests that intermittent fasting may not be more effective than other diets for losing weight. Those looking to improve their health are still advised to pick a sustainable approach, ideally with medical guidance. With obesity rates continuing to rise, reliable long-term solutions remain a pressing need.