I remember reading something about it on BBC, how over processed American Wheat ( or food in general ) leads to those symptoms and they can eat European products and bread just fine.
People get far too much of it (IIRC there even was a Polish study that kids already have a way too high intake), large parts of the population in most Western countries are liver toxic avoiding to analysis of accident victims, it significantly increases your osteoporosis risk, many people (anecdotally, including me) experience lots of health improvements after reducing their intake, and so on.