b12 injection is what drug class Hydroxocobalamin (Vitamin B12): Uses, Alternatives, Side Effects & More Cyanocobalamin (B12) Injection 1000 mcg/mL,
Description
While the RDA is 2.4 mcg, most experts recommend 25-100 mcg supplements for seniors over 65 due to absorption challenges
doi:10.1111/1471-0528.13574

The peptide structure includes modifications that resist degradation by dipeptidyl peptidase-4 (DPP-4), an enzyme that rapidly breaks down natural GLP-1

Wellness clients without a diagnosis sit outside these licensed indications entirely, which is exactly why the prescriber assessment is not optional paperwork

There may be one caveat, though