How does this formula work?

Focus & Energy B12 supplies a clinically effective daily dose of methylcobalamin, which is involved in key reactions in the body that support healthy cellular function. It helps synthesize DNA and generates ATP, cellular energy produced when your body burns amino acids, cholesterol and fatty acids. Vitamin B12 also helps form red blood cells to distribute oxygen and further energize your body. And it plays a central role in nervous system function, the control center of healthy brain activity.*