“But there is more to the story. The reason why some businesses are labeling lemons and limes as non-vegan is because some are coated with non-vegan products, notably beeswax and shellac”

So it’s the coating, and that fruits labeled organic (at least in US?) don’t use animal derived coatings. I think Whole Foods mentions what wax they use, but when I shop other places I guess I gotta lean organic just in case. Bummer