How E-Liquid Works: The Science Behind Vape Juice

June 13, 2025 — By maff ali

If you’re just getting into vaping, you’ve probably come across the terms PG (Propylene Glycol) and VG (Vegetable Glycerin). They might sound technical, but don’t worry, they’re just the main ingredients in most e-liquids, and they play a big role in how your vape tastes, feels, and looks when you exhale.

At Greet Vape, we’re here to break it all down in simple terms, so you can choose the right and UK-compliant e-juice flavours for your personal style.

Expert Breakdown of Vape Juice Science:

Let’s start with the basics. E-liquid (or vape juice) is the stuff you put in your vape. When you hit the fire button, the coil inside your device heats up and turns the liquid into vapour, which is what you inhale.

PG and VG are the two main liquids in e-juice. They’re responsible for how much flavour you taste, how strong the throat hit feels (like the sensation you get from smoking), and how big your clouds are.

Try these most wanted e-juices:

Complete Guide to PG vs VG:

Complete Guide to PG vs VG

What is PG (Propylene Glycol)?

PG is a thin, flavourless liquid that carries flavour really well. It gives you a sharp, cigarette-like throat hit, which is great if you’ve recently quit smoking and want that familiar feeling.

Why some vapers love PG:

  • Stronger throat hit
  • Clearer flavour
  • Less vapour, ideal if you want to vape without making a big scene

Things to keep in mind:

  • It can be a bit harsh on the throat for some people
  • Doesn’t produce as much vapour
  • Moreover, are you ready to find your perfect vape match? Explore top e-liquids and compatible kits and upgrade your vaping experience today!

What is VG (Vegetable Glycerin)?

VG is thicker and naturally sweet. It gives you silky-smooth inhales and those big, fluffy clouds that some vapers can’t get enough of. If you're all about cloud chasing or smoother vaping, VG is your best friend.

Why do some vapers choose VG?

  • Bigger, denser clouds
  • Smoother inhale
  • A bit of natural sweetness in your vape

Things to consider:

  • Thicker liquid = quicker coil gunk build-up
  • Slightly mutes some flavours compared to PG

New to vaping? Discover beginner-friendly e-liquid flavours that suit your taste. Start your flavour journey with Greet Vape now!

Best PG/VG Ratio for Flavour & Clouds:

Best PG/VG Ratio for Flavour & Clouds Most e-liquids don’t use just one! They mix PG and VG in different amounts. That mix is called the PG/VG ratio, and it affects everything from how smooth the vape is to how much vapour it makes.

Here are some common blends:

  • 50/50: A nice balance, smooth inhale, decent clouds, solid flavour. You can try these IVG e-juice flavours that are suitable for MTL Kits.
  • 70/30 PG/VG: Stronger throat hit, bold flavour, less vapour. For instance, you can enjoy vaping pleasure with these fruitdrip’s mouthwatering flavours with your favourite Sub-Ohm Kits.
  • 60/40 PG/VG: Super smooth, massive clouds, slightly sweeter taste, and Vampire Vape is available in various flavours. It is best suited to MTL and DTL vape kits for an enjoyable vaping experience.

Top Tips for Better Vaping Performance:

Top Tips for Better Vaping Performance How to Choose the Right PG/VG Ratio: Not sure where to start? Here are a few tips to help you decide what’s best:

  • Your device matters:
    • High VG e-liquids work best in sub-ohm devices (those that blow huge clouds).
    • High PG e-liquids are great for pod systems or smaller pens, especially for mouth-to-lung (MTL) vaping.
  • Your vaping style:
    • Want to keep it low-key? Go PG for less vapour.
    • Love clouds and smoother hits? VG’s your go-to.
  • Your flavour vibe:
    • PG brings out crisp, intense flavour.
    • VG gives a sweeter, mellow taste with a creamy feel.

    Mix Like a Pro! Use Our E-liquid Calculator to Customise Your Juice. Calculate nicotine strength, VG/PG blends, and flavour ratios effortlessly. No guesswork, just great results.

What No One Tells You About E-Liquid?

Everyone talks about cloud size and throat hit, but there’s more to it:

  • Coils: VG is thick and can clog your coils faster. PG is thinner and easier on coils.
  • Flavour matching: Some flavours (like desserts) taste including Ice Cream Cake, Rhubarb & Custard and Rainbow Rainbow. These are richer in high VG mixes, while fruits often shine in high PG blends.
  • Trial and error helps: Trying a few sample packs lets you test different ratios and flavours without wasting money.

Find Your Perfect Vape Setup in Seconds with Our Smart Vape Calculator. Discover the ideal wattage, coil range, and PG/VG ratio for your device, quickly, accurately, and beginner-friendly.

PG vs VG: Which One is Right for You?

There’s no single right answer. It really comes down to what you enjoy. Your device, flavour preferences, and how you like to vape will all affect what PG/VG mix is right for you. The best thing you can do? Try a few different options and see what feels best. Once you find your sweet spot, vaping becomes a lot more enjoyable. Unlock the Secrets of Better Vaping: Explore Our Expert Guides! Get beginner-friendly tips, pro tricks, and everything in between. Your smarter vape journey starts here.

Maff Ali

Store Manager – Liverpool

Maff manages a Liverpool store and contributes to the GreetVape blog’s content. He is an expert in the vaping industry news, trends, and regulations. Holding a business degree from Liverpool John Moores University, he brings extensive experience in retail management and marketing. His in-depth knowledge of UK vaping laws and market shifts ensures reliable insights on legislation, packaging updates, and retailer strategies.