Some of us never had abnormal blood work but we felt sooooo much better going gluten free it was pretty obvious to us there was something that wasn't getting diagnosed by the current medical practices.

Personally, I don't need an official diagnosis to make my own health decisions when it comes to diet. I just tried the diet and it resolved so many problems. Then out of curiousity I got tested by Enterolab.com and learned milk is also an issue with me. So gave that up and felt even better.

As far as the children are concerned... I guess the decision to weigh is is having them spend perhaps a great deal of their lives burdened with other related autoimmune diseases, or potentially cancer, worth giving them a "normal childhood" (whatever that means).

I'd recommend you to read "Dangerous Grains" if you need a little extra incentive to stay with GF. If your relatives aren't interested in preserving their own health, there's nothing you can do. I know, I've tried!