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Is There Bat Poop in Mascara?

Is There Bat Poop in Mascara_

There’s a lot of unverified beauty claims circulating online, and one of them is about what mascara is made of. As silly as it sounds, most people believe that mascara is made of guano or bat poop.

The big question – Is there really a bat poop in mascaras?

But, is it true? Is there bat poop in mascara? Or it’s just a myth?

The answer is no. There is no bat poop in it. The original content of mascara is guanine. And since the words “guanine” and “guano” have similarities, it is what causes confusion to a lot of people.

Best Mascara Reviews – No Bat Poop!

1. L’Oreal Paris Double Extend Mascara

L'Oreal Paris Double Extend Mascara

Do you want to have a lash extension effect on your eyelashes when you apply mascara? If your answer is yes, then you might want to take a look at L’Oreal Paris Double Extend Mascara.

It comes with two different bristles that will help make the strands look longer and nourished at the same time.

The white part of the tube contains a primer, which should be applied first to nourish the hair. Then, the other side of the tube contains mascara, which should be applied when the lashes are already primed.

If you’re always wearing contact lenses or have sensitive eyes, this is also suitable for you. It doesn’t contain harsh ingredients and it’s smudge-proof, too.

To get the perfect, eyelash extension effect, all you have to do is apply the primer on the lashes first. Then, apply the second step in it right away. You don’t have to wait for the primer to dry before applying step two. Easy, right?


  • Eyelash extension effect
  • Two-step bristle for nourished and longer lashes
  • Suitable for sensitive eyes
  • Smudge-proof


  • It won’t give much volume

 2. Tetyana Naturals 4D Silk Fiber Lash Mascara


Tetyana Naturals 4D Silk Fiber Lash Mascara

If you want to boost the length and volume of your eyelashes, the Tetyana Naturals’ 4D Silk Fiber Lash Mascara can be a great option for you. All you have to do is apply it in the morning and you can get perfectly long and volumized lashes all day.

This is also hypoallergenic and can be used by those who usually wear contact lenses. It also comes with a non-toxic formula, so you can be sure that it’s safe to use.

It is deeply pigmented and can last all day and I’m sure it won’t smudge and flake, too.

Most mascaras have a formula that’s difficult to remove, even if you use micellar water or makeup remover. But, this mascara from Tetyana Naturals is quite different from them because it’s easy to remove and apply.


  • Easy to remove and apply
  • Boosts length and thickness
  • Deeply pigmented
  • Suitable for sensitive eyelashes
  • Flake and smudge-free
  • Has a gentle formula


  • Not waterproof

3. Maybelline The Colossal Mascara


Maybelline The Colossal Mascara

The Colossal Volum’ Express from Maybelline offers a clump-free formula, allowing the strands to become longer and thicker for up to 18 hours.

The strands will become 9 times thicker in just one application. Just imagine how thick they will become if you applied this product twice.

Its formula is also infused with collagen to help nourish your strands from roots to tips. It is also lightweight, so even if the strands become very thick, your eyes won’t feel heavy and tired.

This volumizing mascara is also smudge-free, just like the two brands I’ve listed above. It is also safe for those who wear contact lenses and have sensitive lashes.

It is available in two shades: Classic Black and Glam Black.


  • Clump-free formula
  • Suitable for contact lens wearers and those who have sensitive strands
  • Available in two shades
  • Smudge-free
  • Can last for up to 18 hours
  • Infused with collagen


  • It flakes if not applied properly

Guano, Guanine and Bat Poop?Guano, Guanine and Bat Poop?

Guanine is commonly used in the cosmetic industry as an opacifying agent and colorant, making the products look shimmering and vibrant.

You can find it in nail polishes, skincare products, hair conditioners, bath products, lipsticks, fragrances, cleaning products, and shampoos.

But, how are guanine and guano similar to each other?

Guano - seabird and bat poop

Guanine is derived from the Spanish word “guano”. Guano, on the other hand, is another term for bat poop.

The difference between these words, however, is that guanine has nothing to do with bat poop, even if it’s the Spanish word for guano. It literally doesn’t contain guano or bat poop. What it has are fish scales, so don’t worry because you aren’t applying bat poop on your eyelashes.

Fish scales or guanine in mascara aren’t also good for you, though. That is why you should use any product properly and read the label carefully to see if it contains harmful ingredients.

It can dry your eyelashes. Other than that, it can be damaging to your eyes, too, in the long run. Well, at least you aren’t covering your eyelashes with bat poop, right?

So, what are their ingredients?

Other than guanine’s crystalline form, they also contain different types of oils, waxes, preservatives, and pigments. So, the claims that they contain bat poop is really an urban legend only.

However, bat poop or guano is also used commercially, not just in the cosmetics industry. Since it’s rich in nitrogen content, it is highly used as a fertilizer in farms. And in the past, it was also used to manufacture explosives.

Nowadays, ingredients in mascara are becoming vegan-friendly, natural, and organic, too. So, you can have a lot of great options to choose from when looking for the best brand.


So, now that the question “is there bat poop in mascara” has been answered, you don’t have to worry too much.

It may contain guanine that can also be harmful to your eyes and lashes, but I think this is safer than bat poop, right? Besides, guanine is already guaranteed by the FDA, so it’s safe for any cosmetics.

For the best product in the market, I pick the Tetyana Naturals 4D Silk Fiber Lash Mascara because it comes with great features. Other than making your lashes thicker and longer, it also has a gentle formula that can keep your lashes nourished and healthy all day.

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