how painful are b12 injections to self-inject intramuscular vitamin - Overview Best Vitamin B12 Injection Site:
Description
Do not throw used needles into the garbage

Drug Hypersensitivity and Desensitizations: Mechanisms and New Approaches
Vitamin B12 is necessary only in very small amounts each day
So who should request a test

MIC B12: Like many other brands, MIC B12 can be stored at room temperature, protected from heat, light, and moisture
Gas and air mix contains nitrous dioxide and this gas inactivates B12 in the body
