Leaving the fat behind has unknown consequences. What happens to it nobody knows. Most believe it goes to the liver and kidneys to get filtered out but this isnt a great concept medically. Liposuction has in its name the word suction...as in to suck out the unwanted fat. Dont be fooled into thinking that adding the word laser means it is painless, noninvasive or safer. In fact, pushing a hot laser around blindly in the abdomen can be more dangerous in the wrong hands. So by all means be certain that you are being treated by a board certified dermatologist (inventors of tumescent liposcution)or a plastic surgeon who has been FORMALLY TRAINED in fat removal procedures. If they are the ones on the other end of the lipo device you have the best chance of getting safe effective results. By the way, if your doctor is also offering Lipodissolve beware This product come from cow bile and has been banned in Brazil, UK, and in some states in the USA but not all. It is not and has never been FDA approved or studied and I have seen patients who were injected and had horrible pain, permanent scarring and discoloration from this product injected by doctors and nurses.