b12 injection guide Instruction for Intramuscular (IM) Self-injection of Methylcobalamin 1mg/5mg Best Vitamin B12 Injection Sites:
Description
PTH stimulates a dose-dependent rise in adipocyte intracellular calcium levels that is due to both increased influx and mobilization of intracellular stores (89)

For me, heading into the cooler months of fall and winter, I benefit from the increased energy levels that B12 provides

Metformin: Commonly prescribed for diabetes, metformin can affect the absorption of B12 in the gut over time
Nothing else

A clinician can check additional markers to confirm how your body uses B12

How to inject b12 will depend on which you choose
