Intermittent fasting shown no weight‑loss advantage over conventional diets

Intermittent fasting has become popular for weight loss and metabolic health, promoting periods of no food intake that trigger processes such as autophagy, which researchers say may aid cellular renewal. Health professionals caution that it is not suitable for everyone and can cause side effects like dizziness, headaches, nutrient deficiencies, and, in extreme cases, dehydration or hypoglycaemia.

A systematic review of 22 clinical trials involving nearly 2,000 overweight or obese adults, published in the Cochrane Library, found that intermittent fasting did not produce greater weight loss than traditional calorie‑restricted diets. The average difference was about 300 g, a statistically insignificant amount. While fasting may improve insulin sensitivity, increase fat oxidation, and affect circadian rhythms, these physiological changes did not translate into superior clinical outcomes. The review notes that adherence to any eating plan is the primary determinant of success, and potential adverse effects should be monitored, especially in people with eating disorders, diabetes, or other health conditions.