Carb Up Your Favorite Snack with Carb Block! Now you can enjoy your favorite carb-rich foods and snacks without the worry. Just two tablets of the Doctor's CarbRite Diet Carb Blocker will help prevent up to 38 grams of sugars and carbs from being absorbed by your body. Carb Block contains the proprietary ingredient, Phaseolin EX, a highly purified herbal extract which is rich in Phaseolamin. Phaseolamin inhibits alpha-amylase, the enzyme responsible for carb digestion. In short, the carbs you eat won't be absorbed. Carb Block also contains Gymnemalin, a powerful extract of Gymnema Sylvestre which exerts a hypo-glycemic effect. When combined with our patented dual-chromium formula, alpha lipoic acid and vanadium, Gymnemalin will maximize your body's insulin sensitivity while moderating insulin responses to sugar-rich meals.