Sale! Select options GXN (Greenex Nutrition) Carbo Ex Rated 4.70 out of 5 Carbo Ex Weight Gainer is designed for the bulk gain and to improve the muscle size as it provides 284 kcal and 71.45g carbohydrate in each serving. This supplement is rich in carbohydrate derived from maltodextrin which helps to maximize the body’s glycogen store and helps to digest the supplement easily. The primary work of Carbo Ex supplement is used to maintain a high level of energy during intense exercise and enhance workout performance. Carbo Ex used as both pre and post-workout supplement. Consume one serving a few hours before the workout and one just after the workout to get the maximum benefits.