According to Dr. Oz, there is some science behind using raspberry ketone supplements to lose fat. I came across this article at http://www.doctoroz.com/videos/rasberry-ketone-what-science-says that goes into some of the science behing recommending raspberry ketones for weightloss.
I recommend reading the entire article, but here are some of the highlights:
Raspberry ketone is present in some foods...like raspberries.
Scientists have studied feeding mice a high fat diet along with rasberry ketones, among other studies. The researchers observed less fat in the livers and less visible fat on mice that were given the raspberry ketone. The raspberry ketones seems to assist with metabolism by acting on certain proteins.
According to the scientific research, results on mice are promising for humans. However, it cannot be concluded that raspberry ketones will have the same effect in humans as far as weight loss and increase in metabolism and decrease in fat storage.