<<Disclaimer: Verify this information before applying it to your situation.>> Someone asked the list recently if Tostitos Chips by Frito-Lay are gluten free. I checked with my daughter who works at their Plano, Tx headquarters and she had their Consumer Affairs verify they are, and they do not dust bags with flour. They have a gluten free list of their products they'll send to you if you call their Consumer Affairs hotline of 1-800-352-4477. Jan