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Without this important nutrient, cellular function would cease, and energy would plummet
B12 deficiency can make you feel unusually irritable, anxious, or down
Summary: Various tests measure B12 status, including plasma B12, homocysteine, MMA and holoTC
Cobalamin (vitamin B 12 ) Deficiency Investigation & Management Early treatment of cobalamin deficiency is particularly important because neurologic symptoms may be irreversible
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