Breakfast is usually regarded as the most important meal of a day.As the development of economy and society

the way people eating and exercising also changed.The prevalence of overweight and obesity in adults increases annually and it has become a global public health problem.This study reviewed the studies about the breakfast’s effects on overweight and obesity

thus discussed the relationship between breakfast and overweight or obesity.Most literature revealed that eating breakfast could prevent the overweight and obesity

while the possible mechanism remains unclear in domestic and overseas.At present domestic researches mainly focus on inventory surveys and no inventory study on the effects of breakfast on overweight and obesity has been retrieved in China.In the future inventory studies on how breakfast affects overweight or obesity in adults are needed to fill the blank field and further mechanism studies shall be conducted.