Vitamin B12 (Cyanocabalamine) is vital for the formation of red blood cells, as well as for the proper functioning and health of nerve tissue. It also helps our bodies absorb folic acid, which facilitates the release of energy. 

People with Vitamin B12 deficiency need to have vitamin B12 injections which go straight into the bloodstream, bypassing the stomach. If left untreated, Vitamin B12 deficiency can lead to anemia, as well as nerve and brain damage, which may eventually become irreversible.