can a b12 injection give you a headache Vitamin Injections: What Need To Know Vitamin B12 Injections Dosage and

For treating a deficiency, injections are usually given frequently at the start, for example, several times per week or every other day for a couple of weeks, to quickly build up body stores

We can detect this with a blood test and it is known as megaloblastic anemia

How to Get Vitamin B12 Making sure you get the right amount of vitamin B12 depends on things such as your age, eating habits, health conditions, and the medications you take

(Standard Formula: Methionine 25 mg | Inositol 50 mg | Choline 50 mg | Vitamin B12 per 5ml vial)

That is far beyond the static subcutaneous examples on this page and shows why oral and injected amounts should not be treated as interchangeable