Here are the best vitamin B12 injection sites for each method: Subcutaneous B12 injection sites Usually, the best places to give yourself a B12 shot subcutaneously are the abdomen, thigh, and upper arm, as you can see in this illustration: Although not shown above, the buttock is another good site for B12 shots
Unlike other treatments such as semaglutide and tirzepatide, which act on only one or two receptors, Retatrutide is a triple receptor agonist
Doubling up is not supported by any published research and is not recommended
This multi-receptor approach distinguishes it from existing licensed medicines such as semaglutide (Ozempic, Wegovy) or tirzepatide licensed in the UK as Mounjaro for type 2 diabetes and as Zepbound for obesity which act on fewer receptor pathways
Parenteral Vitamin B12 is the recommended treatment and will be required for the remainder of the patient's life
Recommended Testing Schedule Heres a suggested testing plan for B12 treatment: First test B12 levels before starting treatment Check again after the first dose (usually 1-3 months later) Test every 3-6 months while taking maintenance doses Test more often if you have trouble absorbing B12 or other health issues Interpreting B12 Levels During Treatment When looking at B12 levels, doctors must think about a few things
