I think the only thing we can do, is try to eat as clean as possible. I buy as much organic food I can find. I buy all of my nuts and seeds online at nutsonline in their glutenfree section. (I know nothing is perfect) We must eat, so we just have to do so as clean and healthy as we can, using the knowledge we have learned on these sites. I have been feeling so much better since eating this way it is amazing.
I am now working on weight loss. I have been overweight my whole life. After going grain free I lost 50lbs, then it stopped. I wasn't doing anything any different, just wasn't losing. For the last 6 months or so I had a few relapses of eating corn and rice (in small amounts, but never-the-less I was still eating them). I am now back on track and following the 4 hourbody diet. (low carb basically) I am also taking probiotics and some other of Dr. O's supplements, I really think the probiotic is helping me to lose weight again.
Just don't give up, keep on keepin on! (remember how much better off we are now then we were before learning all of this)