Whole30 Sample Reintroduction Schedule in Whole30 Reintroduction Posted February 12, 2016 I'm not quite up to the reintroduction stage yet, but thinking about it. I'm wondering if I should do a separate reintroduction day for corn products, specifically, apart from other non-gluten grains? I've suspected that corn is an issue, and I know other people have allergies specific to corn. Has anyone tried this? Many people have opted to separate corn out and test on its own day, so you could certainly do that.