vitamin b12 and lipotropic injections reviews Injection B12 vs Lipotropic Shots: Energy
Description
Higher doses do not necessarily produce better results and may increase the risk of side effects like headaches or gastrointestinal discomfort without improving fat loss outcomes

I generally use an 18-gauge needle to draw the fluid into a 3ml syringe
All resolved without intervention

Cyanocobalamin needs to be changed into active forms, while methylcobalamin is ready to use right away