is it normal to feel tired after a b12 injection why do i why do i feel so tired after b12 injection Vitamin B12 I still feel tired after

Chapman LE, Darling AL, Brown JE

Keep in mind when I got the ECG I was having a severe panic attack and had a heart rate of around 110 so not sure if this tachycardia caused by anxiety resulted in this assessment (I think it's an automated assessment from the machine)

Key Takeaways The standard initial dose for severe deficiency is 1,000 mcg intramuscularly daily or every other day

Because of this origin, it is studied as a potential communicator between mitochondria and the rest of the cell, a role researchers refer to as retrograde mitochondrial signaling

Their effect on body composition in research is driven substantially through reduced energy intake and improved insulin dynamics, not through direct action on fat cells