Gnc total lean® phase 2 carb controller®: reduce caloric impact of carbohydrates the gnc total lean® phase 2 carb controller® contains clinically studied white kidney bean extract to help fuel your weight management goals. This supplement contains extract from phaseolus vulgaris, also known as white kidney bean extract, and may minimize the caloric impact of carbohydrates. White kidney beans produce an alpha amylase inhibitor, which might curb the enzymes that aid in the digestion of carbohydrates, thereby slowing their absorption. Alpha amylase may also play a role in the digestion of starches. Bottle contains 120 capsules a supplement featuring white kidney bean extract consuming these capsules may help diminish the caloric impact of carbohydrates emerging research suggests that phase ii has alpha-amylase inhibiting properties which can interfere with starch or carbohydrate digestion might impact the absorption of carbohydrates. Gnc total lean phase 2 carb controller - 120 capsules (60 servings)