Applied Nutrition Carb X is 100% cyclodextrin and is a good energy booster during, before and after exercise. HBCD has a high molecular weight, which helps increase gastric emptying. This means that the carbs will stay in your stomach for less time than regular carbs and are absorbed and sent to the muscles more quickly. This fast emptying of the stomach means that you do not experience bloating after taking Carb X, unlike other carbohydrate products. In addition to HBCD, Carb X also contains 50g of added AstraGin.