The function of white kidney bean is to stop carbohydrates, and the function of b420 is to reduce fat. The direct combination of the two can double the effect.

White kidney bean is a common edible bean in the world, which is cultivated in all provinces and regions of China. White kidney bean is not only rich in nutritional value, but also has high medicinal and health care value. It is a traditional medicine and food homologous food in China. Modern scientific research shows that the white kidney bean extract contains a highly active α -amylase inhibitor, and its chemical composition is a compound glycoprotein, which is called "starch blocker" abroad, meaning "starch absorption blocker". At present, a white kidney bean essence product has been developed in China, which can inhibit the action of α-amylase, block starch decomposition and reduce glucose absorption, thus reducing postprandial blood sugar increase, insulin secretion and fat synthesis.