When your energy level is clicking along nicely during the day, and turns off properly at night, there is an unmistakable feeling of being in sync. Your body must coordinate the function of over 100 trillion cells in order for you to feel in sync, which is done with hormones (substances that give management-like orders). Your brain responds to hormonal signals and your brain creates the messages that become many of the hormones. While this process is rather complex, it is fairly easy to understand that you either feel in sync or you don't.

The conductor of your hormonal orchestra is leptin, a hormone that actually comes from your ...