My B12 is 206. Neuro says normal is from 180 - 800 so mine is normal low. Cal you have symptoms at this level. I have weird vibrations/shaky feeling most of time. Specailly when I am standing or sitting too long. ANA was positive at 1:160 but eveyhting else was negative. EMG negative for left side. All tests so far are negative. I have pain where I have vibrations. In leg calf muscle and behind neck. Am curious. Have thryoid but controlled with meds.