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Nightmare is obvious... see "nut paranoia".
Relief because at some point you see that almost everything contains something toxic, yet somehow mankind survived for thousands of years. --> it can't be too bad --> When it comes to my personal nutrition, I don't care much about most toxins and focus my attention on those that are either dangerous for real or easily avoided.

Ow ... sorry @sco, I completely misread that. I thought it was within the context of living in Portugal. But yep, it’s true. Being informed has its advantages and disadvantages :)