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The correct approach: Test serum B12, MMA, and homocysteine not just serum B12 Use the functional cutoff of 500 pg/mL for optimal status, not the labs lower limit of 200 pg/mL Identify the cause diet, malabsorption, medication, or autoimmune Match the supplementation protocol to the cause and severity Retest to confirm response, and continue monitoring if the underlying cause persists If youre over 50, vegan, taking metformin or PPIs, or experiencing unexplained fatigue, brain fog, or neuropathy get tested
European Union: Not approved under EMA
Slow IV injection is an option when immediate availability of the vitamins is desired or if the patient is already receiving IV fluids
Precautions for Sensitive Groups: Patients with a history of mental health conditions, diabetic retinopathy, or cardiovascular conditions should discuss these with their provider before starting
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