white kidney beans ; northern white kidney bean extract specifically contain "phaseolamine" which have the ability to inhibit the action of amylase which is the enzyme responsible for breaking down complex carbohydrates into simple sugars. By inhibiting this action, the theory is that the starchy carbohydrate will be undigestable and therefore excreted as SHIT . You should injest these approximately 1/2 hour prior to a high complex carb meal (100 grams or more).....ps....it will not do shit for simple sugars.