Natures Aid Raspberry Ketone Advance+ provides 400mg of raspberry ketones and 35mg of added green tea to provide optimum polyphenol levels.More Information: Raspberry ketone is a substance naturally present in a variety of red berry fruits and is the main compound responsible for aroma.Some studies have indicated that as a food supplement raspberry ketone may aid weight loss because it can increase the level of adiponectin, a hormone which is used by the body to regulate the metabolism of fat & glucose & causes the fat within your cells to break up more effectively, helping your body burn fat faster.