A user linked to a thread (which I don't have saved sadly) of a different user talking about how they ordered a random unknown sweetener from somewhere internationally.
The package came by months later, and when the user opened it - white powder coated their kitchen, and their tongue.
They apparently loved the taste of it so much they carried the powder in a shaker with them everywhere. I remember them saying something along the lines of: "This stuff is so good that I haven't bothered to look up any health effects. I don't want to know. I'm fine with dying early, as long as I can keep on using this stuff."
I really wish I could find this comment again.