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Medications: Some drugs, like proton pump inhibitors and metformin, can block B12 absorption
PubMed Fletcher, M.M., Halls, M.L., Christopoulos, A., Sexton, P.M., & Wootten, D
Intravenous B12 Administration Guidelines For those needing quick Vitamin B12, IV shots are a fast and effective way
IV delivery achieves near 100% bioavailability and is the clinically effective route when significant replenishment is the goal
Dermatologists often suggest administering the total dosage in multiple sessions rather than taking a single shot for optimal benefits
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