Meal replacement products, fall into two categories, in my opinion. Those that are supplementary products to boost calorie intake for competitive athletes, and those which seem to infer that if you eat them, then you will lose weight. The performance bars will not necessarily help you loose weight, but if you are a performance athlete, they may give you a boost of quick calorie intake to enable you to keep going, when there is not a realistic chance or desire to have a full meal.

   Meal replacement bars which claim to help you lose weight, will definitely not do so if you retain your old existing bad eating habits. They have been around forever, and remain very popular though. My advice... save your money!