are b12 injections intramuscular or subcutaneous Cyanocobalamin (b12) Injection 2,000 mcg/mL 30mL Conquer Pharma Intrav – My Store Best Vitamin B12 Injection Sites:

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The anesthetic properties of lidocaine help block nerve signals, minimizing the transmission of pain sensations to the brain

Murphy and George Minot for discovery of an effective treatment for pernicious anemia using liver concentrate, later found to contain a large amount of vitamin B 12

Results vary and depend on diet, exercise, and individual metabolic factors

The biological plausibility is strong

Regular Docs here in the US do not lean towards B12 for pernicious anemia