I went on a gluten challenge and then had biopsies three and a half weeks ago.
I'm back on the GF diet now. But after eating GF bread on Friday evening, I had that middle of the night waking "rush" followed by an unhappy tum for a couple of days. Basically, I think that I had the same reaction to GF bread as I did to eating normal bread. It was the Warburtons/Newburn bakehouse bread, which is both wheat and gluten free.
Then it occured to me that my GF diet was almost completely yeast free too... I had a bad experience with some GF bread in the early days, where it chemically decomposed on me - 24 hours after opening it smelled like a ammonia factory. This put me off GF bread in all its forms - and given that I didn't much like the taste of it anyway and it's expensive, I just stopped eating it. I also make my own chicken and vegetable stocks now, rather than using stock cubes, and I never liked beer, so the sources of yeast in my diet were almost non-existent.
My GF diet seemed to be working less well in Oct/Nov last year. I had started eating GF bread again at that time because I was trying to have a more "normal" diet. I'd been losing weight slowly but continuously, and wondered if the lack of carbs was to blame.
Now it occurs to me that I didn't eat any bread in the first five days of my gluten challenge either. It was Christmas so I merely added mince pies and christmas cake to my usual fare. The gluten still had a negative effect on my digestion, but only after I started to eat bread on a daily basis did I begin to feel properly unwell.
I think I could be reacting to bakers' yeast as well as gluten. I can't be absolutely sure that I've remembered all the timings correctly, but it seems to be quite a coincidence.
Has anyone else got an intolerance to bakers' yeast? Is this something that can be officially tested and/or diagnosed? I'm utterly fed up of trying to convince doctors to take me seriously. The nice GP that did take me seriously (and sent me to the gastro) is on maternity leave.