DH skipped his master's. He was struggling with health too, the entire time. He was teaching school (before he went to UM) and there discovered the peanut allergy. He said it was a terrible time for him. Then over the course of the next couple of years he figured out gluten, eggs and dairy. It was after we were married that I figured out he was allergic to corn. Wow--I thought it was me he was angry at, until I fixed corn several times just to see what was going on after that initial spark of wonderment: was it the corn? Yes....no doubt, it was corn. Then it took a while to realize that Cuban restaurants use corn oil in everything, so we quit eating out much. Getting those foods out of his diet cleared his mind enough to be able to think. The next thing to remove from his diet was soy, but it would be another 2 years before we got a clue about that one. Then the BTD was just like the answer to every question. Oh, that's why you feel lousy when you eat that. Well, no surprise. We knew that.
We wouldn't have ever figured out chicken, but that was a big problem too. Made him feel just as bad as if he'd had soy. Corn is probably the absolute worst food for him. It messes him up real bad.
Last business trip he went on he was fed chicken at someone's house. When he told me he'd eaten it, over the phone, I was like, "Oh, no! I mean, it's not like you can reject the food that's placed before you, but were you able to do your job?" He said, "Yeah. Being on the GTD has made my reactions to avoids much less."