A significant portion of Americans have some type of vitamin deficiency, one of which is vitamin B12. Vitamin B12 (cobalamin) is a water-soluble vitamin vital for optimal health. Unfortunately, many of the symptoms of deficiency mimic other health conditions and so it’s often considered last in a variety of health issues.
There are four known forms of the vitamin including methylcobalamin and 5-deoxyadenosylcobalamin, which are metabolically active. Two other forms, hydroxocobalamin and cyanocobalamin, become biologically active after they are converted.
