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You may have noticed your e-juice getting darker have wondered if that means the juice has gone bad. But there’s a chemical explanation for this color change, and it goes back to our high school chemistry class. Here’s why your e-liquid is turning dark.

If you remember your chemistry class at all, you may already know that heat is a powerful catalyst for chemical reactions. Many e-juices are made with artificial sweeteners that caramelize after being exposed to heat. This caramelization causes the sugars to break down or separate, which results in the vape juice turning brown.

As a result, the more you vape, the darker your e-juice becomes producing a gunky buildup on the atomizer. It can also release a volatile chemical known as diacetyl, which can be harmful when inhaled.

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Why is My Vape Juice Getting Dark in the Bottle?

Your vape juice can get dark because of another chemical reaction between nicotine and oxygen. Nicotine is a highly reactive chemical and exposing it to oxygen, or even light can cause it to react and turn e-juice into an all-too-familiar brown color.  But this doesn’t mean your darkened vape juice has gone bad.

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How to Prevent Vape Juice From Getting Dark Vape

While you can’t prevent your e-juice from becoming dark entirely, there are things you can do to slow down the process:

  • Store e-juice bottles in a cool, dark place
  • If you’re concerned with the color, purchase e-liquid that is more PG than VG as VG tends to be naturally sweet. At VaporFi, we have a large selection of e-juices, that will satisfy your wants and needs. Check out our e-juice guide to learn more.
  • Clean your tank regularly. It’s best to clean your tank and coils every time you fill up.

Chances are your vape juice will turn brown eventually, even if you follow these recommendations. Rest assured there is nothing wrong with it, or keeping you from happily continuing to vape!

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