Caffeine and You
Caffeine affects your metabolism by increasing the level of circulating fatty acids, which in turn increases the oxidation of the body’s fuels (thereby enhancing fat oxidation). Caffeine’s ability to enhance fatty acid metabolism is particularly effective in those who are not habitual users.
There are other commercial uses for caffeine. For example, while caffeine is not an appetite suppressant, it does affect metabolism, though it remains unclear weather that will help dieters lose wait. Caffeine in combination with analgesics, such as aspirin, is also used as a painkiller in migraine headache medicine with a combination with an ergot alkaloid, but again, the evidence is still out on this one. The presence of the other alkaloids in colas and tea may explain why these soft drinks sometimes have a stronger effect than coffee even though cola has lower caffeine content than coffee beans.