I’ll tell you what the research really says, but let’s first talk about fat loss pills/supplements in general. There are basically three ways a drug or chemical can aid in fat loss:
- 1. Decrease/suppress appetite
- 2. Prevent absorption of calories
- 3. Aid in lipolysis (the breakdown of fat)
Is there any evidence this supplement does any of these three things? One study demonstrated raspberry ketones had a protective effect on the health of rats that were fed a high fat diet.1 Yes–all this hype over studies on rodents. I’m not aware of any research clearly demonstrating this supplement’s effectiveness for humans in losing weight.
I wish I could say I was surprised, but quoting inappropriate research (like animal studies) has been a favorite tactic of supplement manufacturers for a long time.
Raspberry ketones could be be a good source of antioxidants (assuming they are processed correctly). 2 But that is not the way they are being marketed–at least not in the advertisements I am seeing.
I wouldn’t spend any money on this kind of supplement. Look into a good diet and exercise program if you are really wanting to lose weight.
1. Life Sci. 2005 May 27;77(2):194-204. Epub 2005 Feb 25. Anti-obese action of raspberry ketone.
2. J Agric Food Chem. 2011 Dec 15. [Epub ahead of print] Comparison of Flavonoid Composition of Red Raspberries ( Rubus idaeus L.) Grown in the Southern United States.