-Vitamin B12 (cobalamin) belongs to a group known as the B Complex. It is necessary for nerve tissue health, brain function, and red blood cell synthesis, as well as for the formation and regulation of DNA. Vitamin B12 helps the human body absorb folic acid, which allows energy to be released. This formula contains 100 mcg per serving. Along with folic acid and vitamin B6, vitamin B12 helps heart health by supporting healthy levels of homocysteine, which are already within acceptable range.