Almost five years ago, I had gastric bypass surgery. In the 18 months that followed, I lost nearly 150 pounds. The real challenge, though, came later in the process of maintaining that weight loss. You see, after a few years, I was able to eat larger portions (though not nearly as large as before my gastric bypass surgery) and I am now able to tolerate most foods, at least in small amounts. From talking to other gastric bypass patients, I gather that this is pretty common. It would not be too difficult to put some pounds back on. Moreover, I also came across this amazing weight loss service that is…