Hello folks . I'm trying to puzzle out a blood test result I got recently. As I understand it, high serum B12 normally means B!2 supplementation with too little folate. But I don't see how that could be true in this case. At the time of testing, I was on my 9th day of no B12. Previous to that (10 an 11 days prior) I had taken 1/12 of a perque for those two days. Before that, no B12 for a month. I have never taken very much or for more than a day or two at a time, due to side effects. I've had a total of less than 2 perque in my life. I was also off folapro at the time of testing. It was my 4th day without it and I was quite sick as a result of not having the folate. I am heterozygous for A1298C, and I feel much better with folapro, even without B12. The test showed >1500 pg/mL of B12. Can you folks suggest what this might imply? I don't know if it's related, but B12, with or without folate, feels similar to caffeine to me. I only recently learned that is not normal. Ideas? Questions? Mad hunches? Thank you!