If "y" isn't a thing, then "is x really y" has been answered. Gluten is not the only thing wheat is made of. The research suggests, but it has not been confirm

If "y" isn't a thing, then "is x really y" has been answered. Gluten is not the only thing wheat is made of. The research suggests, but it has not been confirmed, that FODMAPs may be the thing that many people diagnosed as gluten-sensitive are actually sensitive to, and the gluten is just a proxy.