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Intramuscular injection has proven to be the most effective method for those with vitamin B12 deficiencies or choosing to boost their levels for other reasons, second only to intravenous which is most often administered under emergency situations
Once reconstituted with bacteriostatic water, keep refrigerated and handle under sterile laboratory conditions
Some are research-grade peptides used in clinical settings, while others are low-dose, supplement-style capsules with little proven efficacy
J., Cavender, M
Chen Sci Rep 2025;15:18063
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