I'm only 37. I broke my back when I was 4 years old and it's creeping up on me. It wasn't so bad when I was in my 20's, but something does happen when you hit the big three oh!
Some of those studying gluten intolerance are suspecting that as many as 1 in 3 are gluten intolerant. There's a whole ton of health issues related to gluten that most people (and their doctors) don't associate with it, but that improve once they go gluten free. It doesn't hurt to look into it. I got tested at Enterolab.