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Levels below the borderline range (150-180 pg/mL) are considered early B12 deficiency, and when vitamin B12 drops below 100 pg/mL, it clearly indicates a deficiency
Vegetarians and vegans might need supplements or fortified foods
For deficiency, weekly injections are common during the loading phase, and monthly maintenance is standard long-term
Additional info National Heart, Lung, and Blood Institute (NHLBI) Learn more about Vitamin B12 deficiency Treatment options Care guides Further information Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.
This is crucial for patients who cannot absorb B12 through normal dietary means