Obesity is a complex multifactorial disease. It is a preventable disease and usually accompanied by overweight. Obesity has become a massive problem in the world nowadays since it affects around 1,9 billion (39%) adults in 2019. Intermittent fasting (IF) is the act of refraining from eating and drinking for a specific period of time. This method has existed for a long time and gained a lot of popularity in recent years. It is an affordable method to decrease individual body mass index (BMI) and ultimately reducing the number of overweight and obese individual in this world. Therefore, this review article aims to summarize the effect of IF on BMI change.