In order to put new mass, you must eat; yet, not everybody gets the same results when it comes to appetite. As a cancer survivor along with finishing chemotherapy and radiation, I had been struggling with my weight, energy, and appetite shortly after. I knew that I had to find a solution to have this problem resolved. So I found this product and have tested on how it effects me. Slowly but surely, I'm seeing results! My appetite, energy level, and weight improved and I felt like my old self again. I was able to exercise with more exciting energy. The amount of weight that I had gained from the start was from 130 lbs. (at 5'9") to 132.5 lbs.---So 2.5 lbs. within 2 months. My tip is consistency is key. Since this is a supplemental, this can not be taken as a replacement for a meal. It says to "use this in between meals." So, in my opinion, yes, it does work and I find it very useful for me to use in the near future.