Metabolism is a process in living organisms whereby chemical processes produce the energy required to sustain life. During the metabolic process, organic compounds are broken down giving off heat and energy. Simple molecules are used to build complex compounds like proteins for growth and repair of the body's tissues.

The process of metabolism in our bodies converts food into fuel or a particular body substance like muscle, fat, bone or blood. If you have a naturally fast metabolism, the chemicals in your body can quickly and adequately transform nutrients into heat and energy creating in the process a strong body.
Metabolism is slow, the body tends to store these nutrients rather than burning them, leaving fat tissue buildup instead of muscle development. You now have a solution. The Fast Metabolism Diet plan suggests that after years of exhaustive study that one's metabolism can be changed by ingesting the right foods at the right time.
The Fast Metabolism Diet works on the angle that eating more of the right foods at the right time can be a powerful strategy for losing weight. It sounds ridiculous.