There are no scientific studies on raspberry ketone that support claims of weight loss in humans... here's an excellent article that debunks all those ridiculous claims: www[dot]inews1.net/raspberry-ketone
As a registered dietitian(RD) and personal trainer, my advise is to stop wasting your money on weight loss pills and other snake oils... trust me, if a miracle product ever really comes to market, the whole world will hear about it.
Good old fashioned diet and exercise will always be the key to healthy weight loss!
Cheers,