Hi,
My 33 year old husband has been a mess for past 3 months. He's having severe balance problem, extreme fatigue and bouts of depressions. ENT and Neuro have cleared him. He just got his B12 tested and the results are 207 ng/dl (reference ragne is 196.53-863.39). Now I have heard that levels at 200 are considered deficient. However, I am confused by the unit ng/dl. Couldn't find anywhere. Before we start any treatment, can any one please help me with the units? It is at the lower end of normal but I just need some help please! Its top urgent!