does the b12 injection have side effects How Quickly Shot Work? Does It Help to Lose Weight? do b12 injections have side

PubMed Stier, H., Amann, S., & Baumuller, M

Common Side Effects When side effects occurred, they were typically mild, transient, and similar in frequency to placebo groups: Reported Adverse Effects Most Common (occurring in small percentage of participants): Mild to moderate headaches (most frequently reported, often resolving with continued use) Injection site reactions (minor redness, swelling, or irritation at injection site) Gastrointestinal effects (particularly at higher oral doses: mild nausea, diarrhea, flatulence) Fatigue (reported occasionally during initial adaptation period) Rare Events: One case of chest tightness was deemed possibly related to treatment in safety trials

Many usages in wellness clinics remain off-label, investigational

Hollman G, Kristenson M

It does not work through appetite suppression, so eating behavior remains normal