can a b12 injection cause diarrhea Metformin: (Side Effects) First-line for Type 2 diabetes (and used in insulin resistance/PCOS) → most side effects are GI and improve with “start low, go slow” 🔹 Common Side Effects (Mostly GI) Cyanocobalamin - Wikipedia

Monthly B12 injections must be administered under proper medical supervision [20]

According to a 2013 study published in Neurologic Clinics, common B12 deficiency treatment regimens include 1,000 micrograms of B12 injections daily for 5 to 7 days followed by 1,000 micrograms on a monthly basis, or B12 injections once weekly for four weeks followed by monthly injections

Serum B12 levels may therefore serve as a marker of hepatic injury, with higher levels sometimes correlating with disease severity

But the expectation going in should be calibrated to what the evidence actually supports: modest, localized fat loss that likely requires a supportive diet and exercise foundation to be meaningful