Learn where to self-administer a B12 shot and how to do it painlessly This article was medically reviewed by Shari Forschen, NP, MA and by wikiHow staff writer, Amber Crain
Severe anemia Certain neurological disorders, such as numbness, tingling, and difficulty in balancing your body
Avoid using semaglutide or its combination with vitamins if you have a history of thyroid cancer, pancreatitis, severe gastrointestinal disorders, or multiple endocrine neoplasia type 2 (MEN2)
Frequently Asked Questions about Lipo (MIC+B12) Injections Program How does the process work
Common symptoms can include: Extreme fatigue Lethargy Loss of appetite headaches Feeling faint or dizzy Breathlessness Headaches Heart palpitations Tinnitus Additional symptoms of B12 deficiency can include psychological problems such as low mood, irritability, depression, cognitive changes, or blurred memory