Older adults may have difficulty getting sufficient B12 from food or oral supplements, and injections can help maintain adequate levels
B12 injections are concentrated doses of vitamin B12, a key nutrient that plays a critical role in how your body creates energy, metabolizes fat, and supports brain and nerve function
Some studies suggest that sublingual cyanocobalamin (131-133) and sublingual methylcobalamin (134, 135) are effective at increasing vitamin B 12 status
Some individuals may experience mild soreness at the injection site or temporary side effects like headache or nausea
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Translating the signal into proportionate action Persistent, unexplained elevation can justify further evaluation or a search for occult disease when the history, examination, CBC, liver tests, renal function, or other findings support it