<<Disclaimer: Verify this information before applying it to your situation.>> Hello all, The other day I decided to test myself & eat a half of sandwich with Rye bread. I just couldn't help myself. I did not have any GI reaction at all, however, the next day I woke up with a headache and absolutely no strength in my body. I stayed home from work and slept practically the entire day and couldn't get rid of the headache. I woke up the next morning with the same headache, didn't have much ambition but felt better than the day before. I just had blood work done a couple of weeks ago and everything is fine. Could this have been a reaction to the gluten? Nina in CT