Raspberry ketone is the compound responsible for many flavoring and aromatic qualities of cosmetics and processed foods.
When present in high doses, raspberry ketone can exert fat burning effects on various areas of the fat cell. These effects may be similar to those of ephedrine and synephrine.
It should be noted that all evidence for the effects of raspberry ketone has only been observed in vitro (in a test tube). Though researchers are able to raise the concentrations of ketones in a single cell during studies, these same concentrations cannot be replicated in the human body, particularly through oral supplementation.