Is mascara made out of bat poop?

No it is not there is a common mix up between the Spanish term guano meaning dung and guanine . these two things are completely different .guanine is actually a component made of fish scales so ur mascara is probably made of fish scales not bat poop this is a common mistake. read more

Mascara is not made of bat guano, although that is a very popular false belief that is an urban legend of sorts. The FDA regulates cosmetics and no feces of any kind can be used in cosmetics. There is a substance used in makeup called guanine. read more

Guanine is a crystalline material that produces a shimmering or light-diffusing coloring ingredient in products like mascara and nail polish. It is made not from bat feces, but from ground-up fish scales, and it is commonly used in the formulation of bath products, cleansing products, fragrances, hair conditioners, lipsticks, nail products, shampoos and skin care products. read more