Turn off our fat cells.

I thought this idea was the most interesting due the fact that there is a lot of obesity and diabetes  in our country. Not trying to say being big is a bad thing, I just prefer to stay fit myself. But to actually find a way to shut down the fat cells in our body would be quite a great enhancement! It would be much MUCH easier to stay in shape, and then there would be much more male models... Just saying O.o