Abstract
Background: Ramadan involves one month of fasting from sunrise to sunset. In this meta-analysis, we aimed to determine the effect of Ramadan fasting on weight and body composition. Methods: In May 2018, we searched six databases for publications that measured weight and body composition before and after Ramadan, and that did not attempt to influence physical activity or diet. Results: Data were collected from 70 publications (90 comparison groups, 2947 participants). There was a significant positive correlation between starting body mass index and weight lost during the fasting period. Consistently, there was a significant reduction in fat percentage between pre-Ramadan and post-Ramadan in people with overweight or obesity (−1.46 (95% confidence interval: −2.57 to −0.35) %, p = 0.010), but not in those of normal weight (−0.41 (−1.45 to 0.63) %, p = 0.436). Loss of fat-free mass was also significant between pre-Ramadan and post-Ramadan, but was about 30% less than loss of absolute fat mass. At 2–5 weeks after the end of Ramadan, there was a return towards, or to, pre-Ramadan measurements in weight and body composition. Conclusions: Even with no advice on lifestyle changes, there are consistent—albeit transient—reductions in weight and fat mass with the Ramadan fast, especially in people with overweight or obesity.
Highlights
Ramadan falls on the ninth lunar month of the Islamic Hijra calendar, and is considered to be the holiest month of the Islamic religion
The current study extends those previous findings by demonstrating that is the weight lost with Ramadan fasting associated with significant loss of fat mass, and that the loss of weight and fat mass could possibly be influenced by starting body mass index (BMI)
Ramadan fasting led to significant decreases in weight, fat mass, and fat-free mass
Summary
Ramadan falls on the ninth lunar month of the Islamic Hijra calendar, and is considered to be the holiest month of the Islamic religion. 2010 [1], there are hundreds of millions of people that practice the commitments of Ramadan, which include abstinence from eating and drinking from sunrise to sunset. This could mean that, depending on location, Ramadan fasting time could range from 9 to 22 hours per day [2,3]. Ramadan involves one month of fasting from sunrise to sunset. In this meta-analysis, we aimed to determine the effect of Ramadan fasting on weight and body composition
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