what happens if you inject vitamin b12 into a vein Shots Side Effects And How To Treat Them B12 Shots vs. IV Infusions:

However, under reducing conditions, the cobalt center is reduced to Co(II) or even Co(I), which are usually denoted as B 12r and B 12s , for reduced and super reduced respectively

This injection is mostly recommended for patients who are unable to take oral medications, such as before or after surgery

Oral veterinary supplements , often between 250 mcg to 1000 mcg for dogs, per your veterinarians recommendation

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