What I also learned was that people like me who are gluten intolerant are often intolerant of dairy and soy as well. Gluten is the protein in wheat, rye, and barley, and many people who can't tolerate that protein are also intolerant of dairy and soy.
And a lot of people who have Celiac's ,, find out that they can eat dairy after sticking to their proper diet and healing their celia in the gut for 6 months or more. Dairy is difficult for our stomachs to process (bovine, that is), and the Celiac's undiagnosed, irritated, stomach, has a hard time with dairy.