Below are some of the main ways you can get more vitamin B12 in your system: Diet : Animal products like poultry, meat, fish, eggs, and milk contain vitamin B12
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Even so, taking expired supplements may lead to deficiencies if people believe that they are ingesting more of the nutrient than they really are
The key is finding your optimal dose
Trends in Molecular Medicine, 27 (7), 687-699
When symptoms do occur, they usually reflect underlying conditionssuch as liver disease, haematological disorders, or renal impairmentrather than the elevated vitamin itself