Provenance and peer review: Not commissioned, externally peer reviewed
Overarching Principle The fundamental principle of regulation of medicines is to optimise timely access to effective treatments while reducing the risk of harm from improper use
A 2025 meta-analysis of 16 studies involving 6,098 participants found no statistically significant difference between intramuscular, oral, and sublingual B12 supplementation routes
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
Just finished my first month lost 10 pounds This first month worked very well for appetite suppression, not so much weight loss