Hi Boyrocky, well both people are correct. surprised? not quite. cornstarch at its purest doesnt contain gluten. However, all these companies that manufacture cornstarch may contain cross-contamination. so when you buy cornstarch it can actually contain traces of gluten. That is why there is no definite answer to the question is cornstarch gluten free? However, I would recommend you to make your own if you are very concerned.