As for the fad diets - if you HAVE to eat gluten free or whatever because of an allergy, that's entirely different from following the next fad diet.
Absolutely! Sorry if that wasn't clear! I have a good friend with a similar wheat intolerance. And we are off topic--but people have made some very wonderful contributions!
You know, though, speaking of food allergies and such, one more thought and then I'll shut up: I've heard about people who were told they were lactose intolerant, who found they actually could drink milk once they tried it in its authentic, unpasteurized, natural state. Similarly, some people find they can digest wheat much better when they eat authentic sourdough. "Sourdough" is how bread has been made since the beginning of agriculture up until a few decades ago when instant yeast was invented, and so not surprisingly it yields a more digestible and more flavorful food.
Much of the food we have now does not resemble what our ancestors have eaten since the dawn of time (or at least the dawn of farming), and is often in different and less nutritious forms that merely mimic the real deal while reacting with the body very differently. For example, "real beef" is grass-fed (at least mostly), "real bread" is sourdough (and not the processed, imitation kind), "real dairy" is unpasteurized, "real eggs" come from chickens that get to eat wild bugs and weeds, and "real soy products" are fermented in special ways and eaten sparingly--just to name a few. The Weston Price Foundation is a good source of info on this sort of thing, BTW.
This phenomenon obviously doesn't account for all cases of food intolerances and allergies but I think it plays a big role in the current epidemic.
But I'm not a nutritionist or an expert on food allergies, and besides, we've gotten waaaaaay off topic here (I plead guilty as well), so I should probably just shut up now and let us get back on topic...