b12 injection subcutaneous vs.intramuscular Vitamin Sites: All You Need to Know 4 Best B12 Injection Sites:

Depending on the individual, monthly injections of B12 may be sufficient for some, while others may need more frequent doses

Various healthcare providers and medical clinics in the area offer vitamin B12 injections

That gap is worth planning around: the beyond-use window of a reconstituted solution (covered in the storage section) can be shorter than the drug supply lasts, especially for the 10 mg vial, so re-order and reconstitution-volume decisions should be made against the shorter of the two limits the stability window or the drug supply not just the drug supply alone

A missed dose is skipped instead of doubled

About 20% of the relatives of pernicious anemia patients also have the condition, suggesting a genetic predisposition

How To Prevent B12 Deficiency