Like many, my dr. is ill trained for lack of b12 so I'm treating myself. I will lay everything out in point form as to not waste time and for clarity. 35 yr old male. Diagnosed approx 5 months ago with a level of 168. Initial symptoms were: major fatigue, off balance, slow heart rate, poor sleep, shortness of breath. Started on Natural Factors methyl b12 sublingual working my way up to 10,000 a day. Had levels checked and they were just over 1000. Symptoms now much improved except I can't sleep, up every hour tossing and turning, very little deep sleep. I did have sleeping problems prior due to long term stress but was sleeping better until symptoms of low b12 appeared around 7-8 months ago. I've tried just taking doses at different times of the day to no avail. Also quit taking supplements for 4 days and it seems the symptoms are already returning. Any recomendations out there to help get some sleep? Thanks very much!