It kinda makes sense right? Guano is a valuable fertilizer and is highly sought-after. But is it beneficial to put it on your face?

So, this post came to life when my previous co-worker mentioned that her teacher told her that mascara was made from cow stomach. It honestly didn’t surprise me…you’d be shocked to see what ingredients are found in the products we use each day.

However, I decided to do a little more research…

While I didn’t find anything about cow stomach being used in makeup, Idid find claims of guano being a common ingredient. In other words, bat poop in mascara.

Let’s explore this a bit more…