To check the studies, go to: www.pubmed.gov
In the search bar type in: raspberry ketone and fat.
I think you will see 3 studies pop up. 2 on rats and 1 done in a test tube.
And...just because a supplement doesn't cause any harm, doesn't mean it is fine to use. Supplements making health claims that are not supported by evidence is a multi-billion dollar business. Deceiving the public is a crime in my opinion. It robs people of their hard-earned money, gives false hope---and is nothing more than snack-oil salesmen.
SP Dietitian Becky