When I first got the B12 shot, I was really surprised what a difference it made in my energy levels. And thats exactly what happens if youre deficient in this essential vitamin. , B12 is involved in Feeling tired all the time but can't figure out why? Low Vitamin B12 often shows up as just fatigue before turning into something more serious. This article explains the hidden signs, who Feeling unusually tired and fatigued? Having tingling sensations in hands and fingers, or having balance and memory issues? These could be symptoms of Vitamin B12 deficiency. Get a comprehensive check with our Why Do I Feel Worse After My B12 Injection? Understanding Post Injecti Oxford Origins