Nutritionn White Kidney Bean helps reduce the enzymatic digestion of carbohydrates, and it helps improve glucose metabolism within two hours after a meal. This bean extract is commonly known as a carbohydrate blocker. The way it works is the white kidney bean extract helps block the digestive enzyme that breaks down simple carbohydrates into sugar. This results in a lower glycemic index of these foods, slowing down how they are digested and metabolized. This natural supplement can be an effective tool in a complete weight loss program.