I just wanted to share this since I found very little posted on line about this. I was using McCormick spices and most people here feel they are safe. I was regularly getting mystery glutenized which was really frustrating because I generally cook all my food and could not figure out where it was coming from. I decided to swap out my entire spice rack for a gluten free version. I bought Spicely brand on amazon which is certified gluten-free and listed as made in a non shared facility. I also started mincing my own fresh garlic. I have to tell you that I feel 100% better! I still use the Mccormick whole pepper corns and it's likely that only some of the Mccormick spices was causeing me a problem but it seemed too big of a task for me to eliminate one at a time. I tend to be very sensitive so I'm sure many people tolerate the McCormick ones without a problem but for anyone getting mystery glutenized at home I wanted to share this story since it's made such a big difference for me.