The B vitamins all play essential cofactor roles in mitochondrial energy metabolism. These vitamins are essential because we cannot synthesize them in our own body. During exercise, our need for these B vitamins increases due to a higher need for energy, but after exercise they are easily excreted from the body. Nu Skin OverDrive provides important B vitamins to promote normal energy metabolism and to ensure optimal levels in the body both during and after physical exercise. Chromium is an essential trace mineral shown to promote normal glucose metabolism, which allows the body to generate the energy it needs for optimal athletic performance.