Bat Guano In Mascara. Wanu) is the accumulated excrement of seabirds and bats. It is a common misconception that mascara contains bat guano, but in reality, mascara contains fish scales.
After more investigation, i found that guanine also occurs in guano from bats and birds. Some beauty products contain guanine, which is found in bat poop and sounds like guano. Is mascara made from bird poop?
