Yes, yes I've read the various lore articles on moon sugar. But -- what is it? Animal, vegetable, mineral. All of the above? None of the above? Where does it come from? Personally, I think it's related to catnip....

It's made of sugarcane, pretty much. I think there's some talk of sugarcane fields in the new ESO maps, and I remember somebody saying something about a sacred sugarcane field on the forum (though that's probably a fanciful extrapolation. Other than that, the moon(s) are said to be coated in sugar according to the Llesweyr stuff.

I'll tell ya what it is: DARN GOOOOOOOOOOOOOOD!!!!

That would explain the wacky cows on my game jumping over the moon, haha...

I always figured it was Lorkhan's Dandruff or something.

IIRC, it falls from the moons into the ocean, crystalizes and washes up on shore in certain areas of the Elsweyr coast, and is absorbed by certain plants that are then harvested and processed. Now, that's all from memory, and Moon Sugar was never my biggest interest in lore terms, but it is (as far as I know) literally material from the rotting corpse of Lorkhan.

It's like cocaine and skooma is crack because it's made from moon sugars. I think or skooma could be heroin and moon sugar opium.

That was my understanding of it, though I didn't know about it being harvested from plants. I always thought it occurred/was harvested more like salt in the real world. Only instead of dissolved ancient seas it's where it has crumbled from the moons.

I don't believe we are explicitly told. We might be but I've never come across it. ESO may tell us.