For people with celiac disease, it is best to avoid regular oats as they are highly contaminated with gluten-containing grains in the food supply. Most people with celiac disease can tolerate certified gluten free oats, but there are some who react to even certified gluten free options. If you want to test out certified gluten free oats, it is highly recommended to do so under the care of your physician and a dietitian. They can help you identify whether or not you are tolerating certified gluten free oats. This is particularly important for celiacs who are asymptomatic, meaning they don't experience outward symptoms when exposed to gluten. Blood testing can identify exposure to gluten when outward symptoms aren't present.