It’s impossible not to notice the popularity of gluten-free diets these days—now that some supermarkets have entire aisles stocked only with gluten-free products. The argument behind these diets is that, in its most basic form, modern-day wheat bears little resemblance to its distant ancestor, the wheat cultivated ten thousand years ago. Proponents argue that modern wheat triggers inflammation, an overactive immune response, and plays a role in nearly every disease you can name, including brain diseases like Alzheimer’s, Parkinson’s, schizophrenia, depression, and more.