Insurance coverage for B12 injections can vary greatlysome insurers may cover the injections if deemed medically necessary, such as for diagnosed deficiencies or associated conditions, while others classify these injections as elective and may not provide coverage
Now, what about the other side
Long-lasting pain often means that several mechanisms are active at the same time: nerve irritation, medication tolerance, peripheral branch hypersensitivity, previous dental or surgical trauma, viral nerve injury, muscle spasm, or central sensitization
Kondo H, Binder MJ, Kolhouse JF, Smythe WR, Podell ER, Allen RH
10.1086/341354 44 WatsonJ
Glucose uptake was significantly reduced in the distal intestine of mice co-treated with metformin and STF-31 compared with that in metformin-only-treated mice (Fig