B-12 is a naturally-occurring vitamin that helps maintain proper metabolic function and cellular energy levels by helping convert food into energy.** But B-12 does a whole lot more, too: It supports the health of your heart, circulation, gums and mouth, and nervous system.** Furthermore, B-12 helps the development and regeneration of red blood cells, which deliver oxygen through the body.** And it’s involved in DNA synthesis and renewal.** Putting it simply, B-12 plays a role in helping to keep many parts of your system running smoothly.**