Possible Side Effects Mild side effects of Vitamin B12 may include: ( 12 ) Mild pain, itching, or swelling at the injection site Temporary nausea or headache Mild diarrhea Hot flashes Vomiting These side effects do not affect all patients and are generally temporary and mild While rare, more serious side effects of Vitamin B12 injections can include ( 12 ): Irregular heartbeat Heart palpitations Hives or skin rash If you notice any severe reactions to a Vitamin B12 shot, contact a medical professional immediately
Why GLP-1 medications create B12 deficiency risk Vitamin B12 absorption is a complex process that depends on several factors working in sequence
Imagine your body as a high-performance vehicle
Vitamin B12, also called cobalamin, is a nutrient involved in red blood cell formation and energy metabolism
General Precautions: Vitamin B12 deficiency that is allowed to progress for longer than 3 months may produce permanent degenerative lesions of the spinal cord
This is particularly important for individuals with gastrointestinal disorders, reduced intrinsic factor, or other malabsorption concerns