That’s interesting. I was diagnosed a month ago with a B12 deficiency after a lot of blood work. I’ve had bad bouts of bronchitis over the years and it may be related to the B12. I am on 1000 micrograms per day sublingual. Haven’t really noticed any changes in anything. Last weekend I had an unexplained severe lower back flare up for no reason at all which was very odd. It subsided after increased stretching and Advil. I had not heard the sciatica / B12 connection. My neurologist found the deficiency and did a great job informing me about the need for B12 and good nervous system health (and immune system), so there does seem to be a connection.
I started using the B-12 a year after I started working night shift. It was a 12 hour shift 7 days a week and I had a real problem staying awake and also sleeping in the day time. Coffee was not useful. You drink that a lot and it becomes normal and doesn’t wake you up anymore. It’s only good for half an hour or so, anyway. I tried an energy drink but that just made my stomach hurt. I tried something called 5 Hour Energy and that kept me going all night but it was expensive and I am cheap so I didn’t get it again until I was really tired going in. It worked again. The third time I reached for one in the convenience store I read the label. B-12, 500mcg. Aha! I had seen that in Wal Mart. I went to WM after work and found a bottle of 236 500 mcg “microdots” for less than one 5-Hour. By the third use my sleep/wake schedule was straightened out. I slept well in the day time and stayed awake at night. I look everything like that up and did see the sciatica link. A year later my daughter told me she had sciatica and her doctor wanted her to do the shots. I had seen the 5000 mcg bottles at WM and told her to go get some. She is fine with that and never did go in for the shots.