I would honestly tell you to go with the tried and true - diet, cardio, and strength training. I know you mentioned you exercised moderately, which is great, but to really get results, you have to step that up. (I know, I've been there...) You should be doing about 30 minutes of strength training, 4 days a week (and no, you won't end up looking like a man unless you take steroids), and 45-60 mins of cardio from 4-6 days a week, at a moderate pace (in other words, you should not be able to carry on a conversation without some difficulty, but should not be huffing and puffing to catch breath). With the diet - fresh is best, not that low-fat/no-fat stuff since you end up eating worse things with that. Just portion control, good food that is full of fiber, fruits, veggies, nuts, meat. Basically, the key is eating decent portions that are not made for 5 people, and eating multiple times a day (6-8), not just 3 meals. Sounds boring, doesn't sound at all exciting, and yea, it takes time (safe weight loss with anything is 1-2 pounds a week at most) - but you're building up muscle first, which is what makes your metabolism move, and burning fat... so you can see easily why this method is going to give you the best chance at losing the fat and keeping it off. I went down 40 pounds in a year and have yet to put it back on - even after slowing down my routine significantly. Muscles are your friends - muscle = metabolism = fat burning even when you aren't working out.
If you aren't at all impressed with the above and absolutely must succumb to the billion dollar a year industry of things that don't work: Jenny Craig and Nutrisystem make you dependent upon their system - so far as I see, they teach you nothing but that to lose weight and keep it off, you need to continually buy their food. WeightWatchers is much the same, but they at least do the point system, so if you go to Applebee's and just can't control yourself if you get a plate of food, you can use their menu to order things based on points... seems a little better.
In any case, you have to realize these places ARE businesses - then ask yourself how exactly they're making their money. Then ask yourself if you really want to learn how your body works and be able to go anywhere in the world and eat what you feel like and know how to compensate, or if you wish to be dependent upon a system that is making the CEO rich by making you believe that the only way you can lose the weight is by buying their stuff.
Source(s):
194 to 153... did it the tried and true way and it still is off. Holy triad of loss: diet, cardio, strength training.