These capsules provide a concentrated source of Raspberry Ketone, the substance which gives raspberries their characteristic aroma. The ingredient became popular in the US after a show hosted by Dr Mehmet Oz featured it & highlighted its apparent ability to 'melt' away fat. Studies have shown that raspberry ketone appears to boost the levels of a hormone called 'adiponectin' which helps to regulate fat metabolism & also appetite. Higher levels of adiponectin are associated with fewer fat stores.