Now you don't have to feel guilty eating too many carbohydrates. Starch Neutralizer works by neutralizing the enzymes in the digestive system responsible for converting carbohydrates to fat. Clinical studies show that Phase 2 (white kidney bean extract) really works. One eight week study showed that participants who took Phase 2 carbohydrate blocker lost an average of 6.89 lbs compared to the 1 lb average for the rest of the participants. Each capsule blocks more than 1,000 calories of starch.