I used to work with a girl who, every time I was putting mascara on at work (my old boss isn't reading this, is she?), would say, "Ew! You're putting bat poop on your lashes!" I was like, "Whaatttt?" She said that "guano" (bat poop) was in mascara. Well, if you look at your ingredients, it lists "guanine" and we now know that's derived from fish scales, and only related to but not actually, bird poo. According to Cosmetics Info.org, it's FDA approved for use around the eyes, so don't worry. How many of you kittens have heard people tell you there's bat poop in mascara? Leave a comment and let me know! :)

Image: Google Images
References: www.CosmeticsInfo.org

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