how much is the vitamin b12 injection B-12 Injection, 3,000 mcg/mL at Tractor Supply Co 12 per dose Contains a sterile vitamin B Vitamin B12 Injection - Single
Description
PMID 27726382

Quick, easy, simple

intravenous push, single or initial substance/drug

With a water soluble vitamin, such as B12, this is basically going to render the supplement useless, as it is going to dissipate the potency of the dosage which you are taking

Unsupported diagnoses often trigger denials

Once injections or medical treatments bring B12 levels back to normal, oral supplements help keep those levels steady
