In case you didn't see my facebook post, a recent study published in April, 2018, in the journal Nutrients, showed a correlation between garlic, celery, and gluten intake and major depressive disorder (MDD).
Here is a link to the abstract:
Related to that, what I believe is a significant change in food sensitivity testing is the company Alcat doing two Yale University studies reflecting the usefulness of this test. Here are the links to the studies:
IBS and the Alcat test: