Metabolism of Coffee and Its Affects on the Body. This essay discusses how caffeine is a powerful central nervous system stimulant whose effects diminish with increased usage. Larger doses, therefore, become necessary to avoid withdrawal symptoms. The exact mechanisms of caffeine's effects are not well known but are due, in general, to altered levels of certain neurotransmitters and the metabolism of circulating free fatty acids. Pages: 10 Bibliography: 10 source(s) listed Filename: 17409 Metabolism Of Coffee.doc Price: 89.50