Black walnuts taste nasty, just in case you wanted to know. And they are expensive.
But supposedly, they can make night shade allergies disappear. And after two days of pain in my knee for having eaten tomatoes (no other trauma I can think of), I ate a handful (1/3 cup) of black walnuts.
We shall see how it goes.
If it works, I may need to find something that really covers the taste of the black walnuts. And I’ll post on my nightshade allergies post to say it works.