how to give an injection of b12 self-inject intramuscular vitamin - Overview Vitamin B12 Injections: What You
Description
But given that these side effects are very rare, taking vitamin B12 at bedtime should be fine unless sleep disruption becomes a persistent symptom after taking supplements
The reactions people describe most often are anxiety, heart palpitations, and headaches

Applications: Obesity management, stubborn fat reduction, and metabolic syndrome

There are rare reports of mild nausea, often related to injection timing relative to meals