I notice a difference when I don't take these (as opposed to noticing when I do). I don't crave so badly. Obviously, eating a healthy, natural, and balanced diet is going to help cravings AND your overall health, but for my situation, these have been worth the energy of swallowing a pill. DO YOUR RESEARCH. There is creatine in these. Creatine can have interactions with medications, even ibuprofen, aspirin, and acetaminophen. There is also a mushroom-related ingredient, in case you are allergic to mushrooms. Also, for the caffeine-sensitive, check the ingredients, especially cocoa extract. As always, be careful about understanding what you put into your body. These have been great for me over the last month or so, and I will continue taking them.