<<Disclaimer: Verify this information before applying it to your situation.>> Thanks to all who responded. The advise overwhelmingly was that Fritos were most likely the culprit. I layed off of all offending foods and ate real mild foods for a few days and tried a few fritos again (isolating the suspected food) and sure enuf, like clock work 10 hrs later a stomach ache, gas etc. Guess it was that ole' cross contamination thang. C'est l Guerre. Thanks again. Nancy * Visit the Celiac Web Page at www.enabling.org/ia/celiac/index.html *