Hi all, i wondered if those who are more knowledgeable than me could take the time to explain about high b12 levels AFTER supplementation. I had a borderline b12 deficiency and so did mb12 injections daily, for about a year. I had problems tolerating them at first, but gradually built up the dose. They helped with a lot of symptoms an i felt much better - especially fatigue. After a while they werent making any more difference, in fact my health took a big step back again, so i reduced them to a couple a week. I didnt notice any difference at this rate and the good effect had now worn off so it seemed pointless to keep on doing them (apart from using it up as it was expensive!) I stopped altogether, then tried one again and agin had the bad reaction. I now havent done any injections or any b12 supps for about 6 months, yet when i have blood tests my levels are consistently high (about 2,000) What i wnat to know is, how long will it take for the b12 levels to drop? Why have they not dropped when we are told b12 is water soluble and you will excrete what you dont use? Is it dangerous for the levels to be this high? does it show that i am not utilising b12 - as all this time it has stayed high in every test. Would it be foolish to try the injections again to see if they help my overall health? Also wondering if anyone knows anyhting about the relationship between b12 and anemia - i have persitent low iron and ferritin despite supplementation, my blood cells are too small, but i also have too many of them - des this have anyhting to do with b12 or is it completely seperate? I do understand that blood levels do not necessarily reflect tissue levels, but am now wondering if my consistently high levels mean i may not actually be using it up. Thanks for any help in understanding this. all the best, Justy.