at what level should you get b12 injections Shots Dosage for Adults: How Much and How Often B12 Injection – When Is
Description
This bypasses the digestive system entirely

Example (for a 5mg vial reconstituted in 2 mL of BAC water): Total peptide: 5mg BAC water added: 2 mL Resulting concentration: ~2.5 mg/mL Recommended practice: Use sterile bacteriostatic water (0.9% benzyl alcohol) for reconstitution

They also arent even used in the same way prescription and over-the-counter medications are

The FUT2 secretor variant p.Trp154Ter influences serum vitamin B 12 concentration via holo-haptocorrin, but not holo-transcobalamin, and is associated with haptocorrin glycosylation Hum Mol Genet 2017;26:4975-88
