does vitamin b12 injection require a prescription Compounded Cyanocobalamin (Vitamin B12) How to Give a B12

It does not prove that human appetite would remain unchanged or that a human body-composition effect would occur

I bring this up because I've read that B12 is known to raise histamine levels, injections in particular

This product should only be handled by licensed and qualified professionals

doi:10.1002/ana.22229

Antigen-induced clustering of surface CD38 and recruitment of intracellular CD38 to the immunologic synapse

Combined with a GLP-1 receptor agonist, it has a more significant effect on glucose and body weight effects such as: boosted weight loss, improvements in cardiometabolic measures and reduced appetite