Just as it says on the tin... spoiled foods are, apparently, edible. (According to herblore, at least!)Spoiler: show
IMO, it's interesting that nausea shows up on the herblore thing. Makes me wonder if it's possible to mod it in as a plant effect, or if it's strictly limited to spoiled foods.
It also makes the Noaidi's mushroom description a little more honest:Spoiler: show