Yes, Alexander, there are some studies about gliadin effects on intestinal permeability. However, more studies are required to understand the underlying mechanism and whether it can affect everyone.

From the clinical studies carried so far, there is no evidence to conclude that avoiding gluten consumption have any health benefits, unless for those with CD or NCGS.

What we know is that CD is an immune-mediated small intestinal disorder with a strong genetic component that needs intimately regulated transcellular passage of gliadin peptides to be developed. https://www.cmghjournal.org/article/S2352-345X(17)30006-1/fulltext