Cyto-Matrix Cyto-B12 - 500mcg Drops 15ml500mcg of methylcobalamin per liquid drop in a natural blueberry flavour. Signs and symptoms of vitamin B12 deficiency include fatigue, cognitive decline, mood changes, peripheral neuropathy, restless leg syndrome, macrocytic anemia and hyperhomocysteinemia Supplemental vitamin B12 can be found in multiple forms, although methylcobalamin is the form predominantly found in plasma and cerebrospinal fluid Methylcobalamin specifically has been studied for