Not, it's not. Caffeine works as a stimulant as well as a vasodilator; it stimulates the breakdown of fat cells and also widens the blood vessels in the area. As such Caffeine stimulates the circulation and blood flow, which helps remove toxins, fat and excess fluids. When move blood is allowed into the region the natural metabolic pathways of the body are stimulated and you will also burn more fat naturally. Caffeine also inhibits phosphodiesterase. These are enzymes which are responsible for the break down of cyclic AMP, which in turn deprives the body of energy. By preventing the phospodiesterases from breaking down the cyclic AMP the energy is used efficiently. Topical use of caffeine is preferred over oral use, as its effects will be localized and concentrated. Through oral use the caffeine will never reach the target area in a concentrated form.