b12 injections intramuscular or subcutaneous vitamin Store How to inject B12 in your arm B-12 Intramuscular vs. Subcutaneous Injection

Evidence is limited

No specific interactions have been documented that make these combinations dangerous

Most people tolerate them well, experiencing only mild side effects such as temporary soreness at the injection site or mild headaches

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You are a Vegetarian or Vegan Since the primary dietary sources of B12 come from animal products, strict vegetarians and vegans are at very high risk of developing a B12 deficiency