Used the Nima Sensor to test our 2 pizzas that we were told were safely made GF. I took a little from each pizza and it tested positive for gluten. I ran another test with just the pepperoni pizza and that came back with no gluten. I have to assume the Margharita pizza had traces of gluten. We did not let our Celiac family members eat the Margharita pizza. They were fine with the pepperoni and didn't have issues with that one.