People are different. The food proteins which act as opioids to one person do not act as opioids to another person. The food proteins which trigger immune responses in one person do not trigger immune responses in another person.

The hinge response is the small intestine's innate reaction to hyphal wall protein 1 (HWP1). Many harmful gut microorganisms exhibit HWP1 because they use HWP1 to attach to the small intestine wall. People develop an innate immune response to HWP1. Their small intestines release zonulin. Zonulin makes the intestinal lining porous. Zonulin causes the small intestine to pass its partially digested contents into the bloodstream.

Grassy grains, including wheat, also exhibit HWP1. The immune system responds both to harmful microorganisms and to grassy grains the same way, with a leaky gut. This sieve effect places large harmful proteins from wheat and other foods into the bloodstream. From this stage, which foods act as exorphin opioids depends on the patient.

For you, artichokes could be a problem. For me, bacon. The foods I listed above are more common.

Sounds a bit like leaky gut syndrome.