My B12 is usually about 900 when they do a blood test but that's only done once or twice a year and usually after I've had my jab, so bit of a false reading really. My stomach does the same, bloats so bad with wind I can't breathe, that's why I try and have small meals often now, to combat it. I reckon mine is either an ulcer or gastritis (chronic, due to how long I have had it), but I'm a wimp and just put up with it. I used to get heartburn all the time when I was very over weight, but since I have last 5 stone, I only get it every once in a while. I definitely think stomach issues are related to this change though. Someone told me, if you can make it through your forties, you'll live to a ripe old age, don't think I necessarily believe in the latter part of that statement, but I do feel like since I have it forty everything has declined rapidly... so maybe, the fifties will be the new thirties and we'll look and feel fab haha!!