In this age of gluten vigilance, we were recently asked this question and we've since done our research. As it turns out, some toothpastes do have gluten. Having said that, you're not supposed to ingest it anyway. However, if you have coeliac disease and don't want to risk it, there are some brands (eg Colgate) that claim to have no gluten in their toothpaste. This is great to hear, but remember to always check the label!