
An umbrella review by the ICMR-National Institute of Nutrition published in Obesity Pillars analyzed 112 systematic reviews across 50 countries.
Combining diet and regular physical activity proved most effective for sustained weight loss, leading to an average reduction of 3.68 kg beyond 12 months.
Low-calorie diets alone produced the highest short-term weight loss with an average reduction of 2.64 kg within the first three months.