Are you sure you really want to know? Some of the things that can happen are pretty awful. I think it's all in your determination but they're both pretty drastic procedures. As long as you've made a commitment to really stick with the eating part of it you shouldn't have a problem. A friend of mine did it and she really lost weight. The biggest problem is that she still has enough skin for both of us and it's hanging on her little tiny body. She sags from the top of her head to her toes. As long as she wears long pants/dresses and long sleeves she doesn't look too bad but when summer hits and she drags out the shorts, shhheeewww. I'm not sure how long it takes for the skin to catch up with the weight loss or if it ever does.