This is my first post, but I've been reading this forum for over a year. So much great info here.
In addition to celiac, I am also ridiculously sensitive to corn. After some research, I found that the toothpaste I'd been using (Tom's of Maine) was not corn free. The only corn free, gluten free toothpaste that was suggested was Squigle (yes, only one 'g'). Here's the link: http://www.homesteadmarket.com/product/27/brand_squigle Switching to corn free toothpaste has gotten rid of dark spots on my teeth, and I can now brush my teeth without my gums bleeding. Hope it helps