Raspberry Ketone
Phenolic compound from red raspberries used as a fragrance and/or food flavoring. Raspberry ketone is also added to certain fat loss supplements due to evidence that suggests it has anti-obesity effects. An unpublished pilot study on a proprietary form called Razberi-K™, demonstrated it enhanced post-exercise fat oxidation, although the results were apparently not large enough to be statistically significant.
Raspberry ketone may also be listed on supplement labels by its chemical name: 4-(4-hydroxyphenyl) butan-2-one.