<<Disclaimer: Verify this information before applying it to your situation.>> I've had DH for over 30 years--the doctors put me on Diason in the '60s and later Dapsone. On the GF diet, I don't have any outbreaks. Like Roy Hall, I must take a Dapsone tablet when I get a shot of gluten--I recently had Chinese food that was cooked in soy sauce (wheat) and had to take 100mg. My reaction time is 24 hours or less. I have severe itching during the night after I get the gluten and am broken out the next morning. I seems that, as these episodes get further apart that I become more sensitive to gluten. I recently had a reaction after eating a Caesar salad which had had a few crutons picked out. I think the crutons contaminated the salad dressing. We should point out to all DH patients that, whenever they take Dapsone, they are masking the symptoms of Celiac disease--intestinal damage and all the rest. Good luck with your diet, Roy. With such a long reaction time, you are going to have more trouble identifying the bad stuff than I do. Aloha.