For individuals requiring supplementation due to confirmed deficiency or malabsorption, therapeutic doses vary considerably depending on the underlying cause: Dietary deficiency : 50150 micrograms daily orally, or cyanocobalamin tablets as prescribed Pernicious anaemia : Initially hydroxocobalamin 1 mg intramuscularly three times weekly for two weeks, then maintenance injections every two to three months [3] Neurological involvement : More intensive regimens may be required, with hydroxocobalamin injections on alternate days until symptom improvement [3] NICE guidance emphasises that supplementation should be evidence-based rather than speculative
Development of improved formulations or delivery systems could potentially enhance therapeutic efficacy, reduce dosing frequency, or improve patient compliance with treatment protocols
Because its derived from a gastric protein, its uniquely stable in the harsh environment of the stomach
Because the body cannot make B12 on its own, it has to come from food (meat, fish, eggs, dairy) or from supplements
Foods that are naturally rich in vitamin B12 include meat, poultry, fish, and dairy products