@drgo 

I have a theory: eating local food is part of an “information” story told to your body (the gut being a “second brain”). The other part of the story is given by local pollen etc. breathed in or otherwise contacting your body.

When the two stories match, i.e. some of the local pollen is from the local food, your immune system relaxes.

Thoughts? 

 Interesting. Worth scientific study. 

 Agreed. Interesting idea and worth studying. 

Allergy injections, to the extent I understand it, are just big doses of antigens to desensitize the patient.