Are you tired, lethargic?

Are you tired, lethargic, and a frequent victim of the 3 p.m. slump even though you live a healthy life? Many people think that getting enough sleep, eating well, and exercising will guarantee a life without fatigue, and while that's a great start—it's not always enough. If you can relate to this, then it's important you learn the scientific secret to optimal energy levels.