The only thing that has helped me.

So, after trial and error and not finding anything about this online, I decided to post here. I had been on and off struggling with sleepless nights for decades and after an especially bad stint after trying a vegetarian lifestyle for a month, I figured out a lot of vegetarian processed foods are supplemented with with synthetic B12, Cyanocobalamin. I found that if I cut synthetic B12 from my diet I had no restless leg syndrome after about one week. I haven't had a problem for years because a check every product label and avoid anything with synthetic B12. Naturally occurring B12, methylcobalamin, from foods gives me no issue, though I don't really take any large dose supplements. I was reminded last night (which prompted me to post) of how sensitive I am to this after I ate some home made rice crispy treats after work, that my kids had made while I was gone. I ate two small 2x2x2" squares, probably a small serving of the cereal. Took me hours to fall asleep that night after waking multiple times at just the point I usually fell off with that all too familiar, random sensation that I had to move my legs/feet. I woke up in the morning wondering what could possibly have caused it and remembered the random addition to my diet and checked the discarded cereal box to find it had 30% daily portion of B12.
I've seen no literature on this particular topic and after pointed internet searches I have not seen this covered. Thought I would throw it out here in the hope it helps anyone else. It's not hard to cut it out if you look for it and I don't feel restricted in diet at all. I know it may just be something that is unique to me, psychosomatic or whatever but....whenever my symptoms start to show up (even after years of not having syptoms) I have always been able to track it to synthetic b12, after I unknowingly consumed a partially processed food containing it. Rarely at a restaurant, but when it happens it has been at a vegetarian one. Best wishes and I hope this helps someone!!!