What cosmetic companies use guano?

Answer:

None.

There is a chemical called "guanine" in some makeup to make it pearlesque, but it USED to be made from fish scales. It's made synthetically now. It can't be made from guano, which is bat poop.

First answer by Jmowreader. Last edit by Jmowreader. Contributor trust: 1120 [recommend contributor recommended]. Question popularity: 1 [recommend question].