b12 injection given wrong Vitamin Side Effects and Safety Treating Severe Vitamin B12 Deficiency

Because injectable B12 is so affordable, it is safer to just obtain a fresh supply

In short, our recommended vitamin B12 shot dosage and frequency is around 1 mg per shot, injected daily for at least 90 days

[21] Within cells, cyanocobalamin is converted to methylcobalamin and 5- deoxyadenosylcobalamin, coenzymes that participate respectively in homocysteine remethylation to methionine and in the isomerization of methylmalonyl-CoA to succinyl CoA, reactions essential for DNA synthesis, erythropoiesis, and myelin maintenance

Only testing can tell you the answer, but a daily B12 injection schedule should be your starting point

The syringes that come with the Vitamin B12 injection kit are meant to only be used once