White kidney bean is a kind of bean food, which contains calcium, phosphorus, iron, protein, fat, dietary fiber, carbohydrates and other nutrients. Usually, white kidney beans have a certain weight loss effect. Weight loss and obesity are mostly caused by uncontrolled diet and lack of exercise, which leads to the intake of more calories than consumption, and the excess calories are converted into fat. The α -amylase inhibitor in white kidney beans helps to block carbohydrates and lose weight to some extent. However, white kidney beans belong to food, and the weight loss effect is limited. It is suggested to arrange the diet reasonably, eat more foods with lower calories and take part in physical exercise appropriately.