<<Disclaimer: Verify this information before applying it to your situation.>>

Today I called Ultradent, maker of Opalesence Xtra teeth whitener, at 1-800-
552-5512, and spoke with a dentist. He was well acquainted with Celiac
Disease, as he believes his wife has it. He assured me that all Ultradent
bleaching products, both at home and office versions, are totally gluten
free.