why do you take b12 injections Shots at Home: How, Where & How Often to Inject Yourself How Can Vitamin B12 Shots

B12 injections are immediately absorbed in your bloodstream

Common, mild side effects: Pain, redness, or itching at the injection site Mild nausea or diarrhea Headache Temporary dizziness Rare but more serious reactions: Allergic reactions (rash, swelling, breathing difficulty) Heart palpitations Low potassium levels during rapid correction of severe deficiency Very rare cases of anaphylaxis requiring emergency care Seek medical attention immediately if you experience symptoms of a serious allergic reaction

According to the National Institute of Health, the Food and Nutrition Board (FNB) didnt establish an upper limit for vitamin B12 because of its low risk of side effects

A typical loading dose is 1,000 mcg (1 mg) administered intramuscularly several times per week (such as every other day or 3 times per week) for a couple of weeks