Because of the relatively low calorie and carb content of Mass XXXL, it is not really designed for ectomorphs or hardgainers . It is quite ideal for endomorphs and mesomorphs , who do not require the additional carbs to put on mass. So for these people, taking Mass XXXL during bulking phases would be very ideal for seeing some lean gains. As weird as it sounds, men and women wishing to lose weight can also benefit from using a partial serve of Mass XXXL as a meal replacement. This will help reduce their overall calorie intake for the day which will aid in weight loss.