ps. I still use lemon/orange peel for some baking, poisoning my guests (=myself, because loner life)

Haha I sometimes do, too. ;) But the truly excellent thing about chocolate cake - it doesn't need peel .It just needs chocolate.

but who the fuck knows really

Exactly. We know next to nothing about what goes into our food really. because who's going to come straight out and say 'it's poison, really'?