Thermalean is a brand name for a diet pill and supplement which once contained the stimulant ephedrine. Many of the new "ephedra-free" products now susbstitute synephrine for ephedrine. It is a fat burner whose ingredients include caffeine, glucoronolactone and taurine (a combination present in the "Red Bull" energy drink), bitter orange (synephrine), green tea extract and carnitine. Although research on carnitine has been inconclusive, it is generally not been found to be effective for doses under 2,000 mg (there are 15 mg of carnitine in Thermalean.) It retails for about $109.99.