Important question regarding Vitamin B12 test! Urgent!

[sa231181]

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!

[Red_Star]

ng/mL = pg/mL.

"Some researchers propose that the current standard norms of vitamin B12 levels are too low.[48] In Japan, the lowest acceptable level for vitamin B12 in blood has been raised from about 200 pg/mL (145 pM) to 550 pg/mL (400 pM).[49]"

[Jumong]

It's nanograms/decilitre, but I don't see how that could help. As for the results, yes, they are at the lower end of normal, but it is important that the reference range should be the one given by the lab and not some stuff you might have found on the internet. Different labs use different methods of analysis.