how long b12 injections last Does A Shot Last? Affecting Factors of B12 Injection How Quickly Does B12 Shot

The long half-life means you will still have therapeutic drug levels even several days late

While generally well-tolerated, some individuals may experience side effects such as: Irritation or redness at the injection site Temporary fatigue or nausea Immediate medical consultation is recommended if you experience severe side effects or allergic reactions

There are three groups of people who should ensure they have a regular, reliable source of vitamin B12 by supplementing their diet with vitamin B12-fortified foods or B12 supplements: those whove had bariatric surgery (which can sometimes impair absorption), those eating plant-based diets, and the more than a hundred million Americans older than age 50

Vitamin B12 for injection is a prescription-only medicine for good safety reasons