b12 intramuscular injection diner Shots vs. IV Infusions: What is the difference? Best Vitamin B12 Injection Site:

None of the B12 gets lost in the digestive process

No major side effects either, which is nice

Common, mild side effects: Pain, redness, or itching at the injection site Mild nausea or diarrhea Headache Temporary dizziness Rare but more serious reactions: Allergic reactions (rash, swelling, breathing difficulty) Heart palpitations Low potassium levels during rapid correction of severe deficiency Very rare cases of anaphylaxis requiring emergency care Seek medical attention immediately if you experience symptoms of a serious allergic reaction

That is certainly enough to justify taking the vial out of circulation and investigating it properly

B12 therapy requires the same kind of regular check-ins to stay effective