Most of my recommendations will be based on my experience with these products and my experience with my own athletes. This is my personal opinion, and not a recommendation of the companies. I am not a medical doctor nor a medical research doctor. I only recommend products that I believe will work for my athletes. Please be sure to check the reviews on these products, and be aware of any other specific issues with the product or their packaging. This product has a great reputation. It seems to be the most popular and widely used one. I have had excellent results from this product in the past and recommend it highly. For most of us, the idea of eating a low calorie diet is anathema, but not when it comes to sports nutrition. I'm sure many of you have had similar experiences as I have and are asking yourself the same questions as me. I'm sure a lot of you have heard of and used these products before and know what to expect from them. These products are the go-to stuff, and I know they are a good product for a number of people, but are not perfect for everyone.