are there different types of b12 injections Methylcobalamin vs Cyanocobalamin: What's the Difference? How to Choose the Right

Lack of absorption and genetic factors may also contribute to vitamin B12 deficiency

The main reason that a doctor would prescribe vitamin B12 injections is if the patient is unable to obtain enough vitamin B12 on their own, whether they have pernicious anemia or are unable to get enough of the vitamin through their diet alone

GRAS status does not equal drug approval, but it does indicate that the regulatory body considered the compound safe for human consumption at the doses tested

This method, typically subcutaneous or intramuscular, often represents the gold standard for achieving high and predictable bioavailability for many peptides and small molecules