"Carbohydrate Blocker contains Phaseolamin 2250, a derivative of the white kidney bean Phaseolus vulgaris . Phaseolamin 2250 slows down the digestion of starch by inhibiting alpha-amylase, the key enzyme that breaks down starch into glucose so that it can be absorbed by the body. When starch digestion is slowed, starch may pass through the body without being fully absorbed. Carbohydrate Blocker may help support weight loss when used in conjunction with the Maximum Metabolism Weight Loss Plan."