There are some chemicals which, when injected into fat, cause it to die. The body then removes the dead fat cells.
While other places in the world may allow this to be done (mesotherapy), the FDA and most legitimate doctors do not do this in the US. In fact, several countries that used to allow this (eg France, Brazil) have recently banned the practice.
Why? Because there have been many problems, infections, tissue loss, etc with this. It is presently being studied in the US under very carefully controlled scientific studies. You would do best to wait until the results are in before starting out.
Elliot Jacobs, MD, FACS