These are all protein bars that are sold in the USA and Europe, and are available for purchase in Europe, as well as the US and Canada. For this review, I will use a specific bar and specific product. The specific product is called GNC Nutrition Protein Bar, and the specific bar is the MCT Bar. MCT is a fat-soluble carbohydrate. The MCT Bar has a great nutritional profile, but it's a little bit higher in calories, which means that you may feel like you are eating more calories than you are consuming. There is no official calorie value for a MCT bar, but I would imagine that if the bar is between 20 and 30 grams, it is likely to be within that range. MCT bars have a variety of nutritional benefits. For more information on the nutritional benefits of MCT, check out this article by the US Department of Agriculture. You can find the MCT Bar on Amazon, in many different brands and colors. The MCT Bar is a great place to start your diet, and can help improve the health of your body. My name is Dr. Mark Haub. As a licensed physician and registered dietitian, I offer a comprehensive approach to nutrition and wellness.