what does the b12 injection do Best Vitamin Site: Administering B12 Shots Are Vitamin B12 Shots Right
Description
The medication should not be exposed to extreme heat, freezing temperatures, and direct sunlight to maintain its potency

Orally-swallowed B12 tablets are just as effective as injections in the vast majority of patients, except those with digestive issues that may hamper absorption

The numbers below come from two places: rodent studies scaled to a human size (allometric scaling) and several years of research community use reports

NDC requirements vary by payer
