As with all things involving weight loss, what you eat and how much is important :) But there are no counting calories and no starving yourself! I am able to eat pizza, pasta, bread, etc and STILL lose weight...I just watch what I eat through the day. Plexus also cuts down on your cravings so you don't eat as much. Exercise is not necessary, but encouraged. Plexus pulls toxins out of the body and paired with the Accelerator pill will accelerate weight loss. You also need to drink half your body weight, in ounces, of water each day to help flush the toxins out.