do b12 injections make you gain weight | Loss Program Vitamin B12 Injections: Boost Energy

patients with lower baseline levels often feel a faster initial response

Some common side effects are feeling or being sick and diarrhoea

The abdomen (avoiding a 2-inch radius around the navel), outer thigh, and upper arm provide suitable injection locations with adequate subcutaneous tissue

Hill, 2013

Tirzepatide accounts for fewer nerve-sensitivity reports than semaglutide, but no incidence has been established

If you've been consistent with daily dosing, proper reconstitution, and refrigerated storage, and still see zero change at 16 weeks, the issue is likely absorption or individual receptor sensitivity rather than insufficient dose