vitamin b12 injection 1000 mcg Out of Stock - (Generic) Injectable Solution, 1000-mcg/mL, 100-mL vial - Easy Refills For dosing Cyanocobalamin (Vitamin B12) Injection 1000
Description
The B12 component is highly stable, but tirzepatide itself slowly degrades in solution
Vitamin B12 Status and Optimal Range for Hemoglobin Formation in Elite Athletes

While B12 is available in oral supplements, absorption can vary greatly

Which of course lead me to wonder, but how does anyone know what the good stuff is

The needle is very short (think insulin syringes), and doesnt go beyond the fat tissue