Does mascara have bat poop in it?

It is a common misconception that mascara contains bat guano, but in reality, mascara contains fish scales. ... According to Snopes, the confusion arose because mascara does contain something called Guanine, which many people confused with guano. read more

Bat poop or not, mascara can be a dangerous beautifier if handled carelessly. Application problems routinely cause the product to end up in the eyes of users as well as on their lashes, resulting in numerous emergency room visits (2,390 in 1983, for example). read more

According to Snopes, the confusion arose because mascara does contain something called Guanine, which many people confused with guano. Guanine is a crystalline material that produces a shimmering or light-diffusing coloring ingredient in products like mascara and nail polish. read more

We have achieved great things with compounds found in nature, just not their poop. Myth: Bat Guano is not used commercially for anything. Fact: Bat Guano is used in many products, such as fertilizer (a common use for waste). It’s just not used on your peepers. Myth: Bat Guano is the only product falsely believed to be in mascara. read more