I think once you have reached your goal you will be use to eating less and more aware & educated. I lost 75 pounds in 2 years with diet and exercise alone....I felt better at that time then I could ever remember. My b/f and I were doing a long distance relationship during most of that time so I threw myself into fitness to get my mind off him and to counteract the depression......but when he came home....I threw myself back into him....I stopped working out and my eating habits went to hell....I gained almost 40lbs back in 4 or 5 months! I went from 280 to 205 within that 2 years.....and I went from 205 to 240 (ok so it was 35lbs) in just a few months. You have to truely make a life change....dont think of this journey as a diet.....you are basically redesigning your lifestyle. I guess what Iam saying is..... it is really all up to you.....then Phen is just a helper...you are the one who will be doing the hard work. When the phen is gone you should be strong.....you just have to stay positive and just keep going full steam ahead.