<<Disclaimer: Verify this information before applying it to your situation.>> Hello Everyone! Thus far, most people who responded were looking for the same type of information that I am. I did get a post from a dental hygenist who is looking into the ingredients. I will summarize her responses back to the list. She is not able to do it before my husbands appointment. I did just speak to the dentist. He indicated that to make the temporary crown, the ingredients are synthetic based (aluminum, plastics) and that it should not cause a problem for celiacs. I will keep everyone update in the next week or so, and let you know if my husband had a reaction. Kristen White, CT