Oh yes ... wheat can make you crazy. Oh my, yes.
This question brings back SO many bad memories....
I spent six years living with a woman who felt that she had a "wheat allergy" although the many allergy tests she had did not convincingly support this theory. Also, she was never a good fit with the celiac symptoms, although attempts were made to shoehorn her into that diagnosis on more than one occasion.
Nonetheless, I was extremely supportive of her efforts to eat wheat-free. To this day I'm not so fond of quinoa -- her grain of choice and a frequent-if-inferior pasta substitute in her cooking -- even though we split up twelve years ago and I haven't touched it since.
The reason? Because when she ate wheat (I never noticed this outcome if she ate other glutinous grains) it was like instant PMS. Combined with roid rage. With just a little bit of Angel Dust to make things interesting.
In short, she turned into Godzilla in the throes of a failed exorcism.
Her head did not quite rotate 360 degrees on her neck. But she became quickly, insanely, irrationally angry. She'd rage, scream, throw things, take astonishing offense at mundane provocations, and generally make her son and me flee the suburbs of Tokyo. Usually she had just enough self-awareness to go "Oh, %&#@, did I get wheated?" and then go and hide for a few hours. But it was scary-bad.
A certain sort of male cynic will be thinking "She's a woman, they all do that once in a while" and if there should be such a man in this crowd, all I can say is "My brother, I have lived in the place you are coming from and I do understand your pain." But no, despite superficial similarities to moments we have all experienced, this was a temporary insanity of an intensity and volatility not generally encountered.
I don't know about a wheat allergy making a person act crazy. My brother had an allergy to wheat (confirmed by allergen tests conducted by our doctor) when he was a child. He was also allergic to milk among other things. He would get a stuffy nose and a cough and some type of weird white mold growing behind his ears. He outgrew his allergies and doesn't seem to be bothered anymore. But I have read that the Salem witch trials in which several people were accused of being witches by 2 or 3 young girls may have been caused by the girls ingesting wheat or other grains contaminated by a fungus. I have read of other such things throughout history. There definitely toxims in some foods, esp. if they are stored improperly. Here is a technical article about it:http://www.ianrpubs.unl.edu/epublic/liv ... ec1880.pdf
If you don't want to read the entire article, scroll down to the part about animal and human health. It is very enlightening.