Except now I have the problem of trusting that this new supplement isn't contaminated with anything, _and_ that the "microscopic pores" resulting from this "patented process" don't turn out to have some harmful effect in the body.

I guess it would be sort of similar to activated charcoal? And that's surely well studied, and also "eaten"

You might have just filtered off all the nutrients and have yourself a dietary deficiency. Oops.

And your supplements might well be contaminated...

I suppose you wouldn't be eating these oats regularly? More like a couple times, then test the levels and maybe repeat after a while?