What Are VG and PG? Vape Juice Base Liquids

Ever flipped a bottle of e-liquid over and seen numbers like “70/30” or “50/50”? Those two numbers are the single biggest clue to how your vape will taste, feel, and perform — and they come down to two ingredients: VG and PG. If you’ve ever wondered what VG and PG are, this guide breaks it all down in plain English so you can shop smarter for your next bottle.

What Are VG and PG in Vape Juice?

Almost every bottle of e-liquid (also called vape juice) is built on a base of two liquids: vegetable glycerin (VG) and propylene glycol (PG). These two ingredients usually make up 90% or more of the bottle, with the rest being food-grade flavorings and (optionally) nicotine. When your device heats this base, it turns into the vapor you inhale.

Think of VG and PG as the yin and yang of vaping. Each one brings something different to the table, and the ratio between them shapes your entire experience.

What Is Vegetable Glycerin (VG)?

Vegetable glycerin — also known as glycerol or glycerine — is a thick, clear, odorless liquid with a naturally sweet taste. Its chemical formula is C₃H₈O₃ and it has a molecular weight of 92.09 g/mol.

• Source: VG is plant-derived, typically extracted from vegetable oils such as coconut, palm, or soybean oil.
• Texture: It’s syrupy and thick — roughly 20 to 30 times more viscous than PG.
• In your vape: VG is the cloud-maker. It produces thick, dense vapor and a smooth inhale, and adds a touch of natural sweetness. Vapor Authority

VG is also widely used outside of vaping — in foods, cosmetics, toothpaste, and pharmaceuticals — and it carries FDA “Generally Recognized as Safe” (GRAS) status as a food substance (21 CFR 182.1320).

What Is Propylene Glycol (PG)?

Propylene glycol is a thinner, colorless, nearly odorless and tasteless liquid. Its chemical formula is C₃H₈O₂ with a molecular weight of 76.09 g/mol.

• Source: PG is a synthetic compound, most commonly made from propylene oxide (a petroleum derivative), though bio-based versions made from glycerin or plant sugars also exist. Drip Hacks
• Texture: It’s runny and thin, closer to water than syrup.
• In your vape: PG is the flavor carrier and throat-hit provider. It delivers sharper, more accurate flavor and that satisfying “catch” in the back of your throat that mimics smoking.

Like VG, PG shows up everywhere in daily life — in food products, medicines, inhalers, and cosmetics — and it’s also recognized by the FDA as Generally Recognized as Safe for use in food (21 CFR 184.1666). PetfoodIndustry

VG vs PG: The Key Differences

Here’s a quick side-by-side of how the two e-liquid base ingredients compare:

(Boiling points per Duell, Pankow & Peyton, published in Chemical Engineering Communications in 2018, which measured the propylene glycol + glycerol system at 1 atmosphere ranging from 188.6 °C for PG up to about 292 °C for glycerol; Britannica lists PG at 187.6 °C.)

The short version: VG gives you clouds and smoothness; PG gives you flavor and throat hit. Most e-liquids blend the two to strike a balance, and the ratio decides where you land on that spectrum.

What Does the VG/PG Ratio Mean?

The VG/PG ratio is simply the percentage of each ingredient in the bottle. A “70/30” e-liquid is 70% VG and 30% PG. (Watch the order — most brands list VG first, but some list PG first, so check the label.)

Here are the most common VG PG ratios you’ll see when shopping:

• 50/50: A balanced blend. Moderate clouds, solid flavor, firm throat hit. Wicks easily in small coils.
• 60/40 (VG/PG): Slightly cloudier while keeping strong flavor and a mild throat hit.
• 70/30 (VG/PG): The most popular ratio for sub-ohm and direct-to-lung vaping. Big clouds, smooth inhale, good flavor.
• 80/20 (VG/PG): Heavy clouds with a very smooth hit and slightly muted flavor. Needs a powerful device.
• Max VG (90/10 or 100% VG): Maximum vapor, ultra-smooth, minimal throat hit. Built for cloud chasers with high-powered gear.

How the VG/PG Ratio Affects Your Vaping Experience

Even small changes in the ratio can noticeably change how your vape performs. Here’s what each factor is influenced by:

Cloud Production

If you’re a cloud chaser, VG is your friend. Higher VG ratios (70% and up) produce the thick, billowing clouds you see in vape tricks and competitions. A 50/50 blend will produce noticeably smaller clouds than a 70/30 or 80/20.

Flavor Intensity

PG is the better flavor carrier because it’s thinner and mixes with flavorings more effectively, so higher-PG blends deliver crisper, more defined flavor notes. There’s one exception: rich, creamy, and dessert flavors often shine in high-VG blends thanks to VG’s natural sweetness.

Throat Hit

Throat hit is the sensation you feel on the inhale. Higher PG means a stronger, sharper throat hit — closer to smoking a cigarette. Higher VG means a smoother, gentler inhale. Notably, a 50/50 blend feels “stronger” on the throat than a 70/30 blend even at the exact same nicotine level.

Which VG/PG Ratio Suits Your Device?

This is the part that trips up new vapers most. Your device — specifically your coil — decides which ratio will work well. Use the wrong ratio and you’ll get leaks, dry hits, or burnt coils.

Mouth-to-Lung (MTL) Devices, Pods, and Starter Kits

These low-powered devices use small coils with tiny wicking ports. Thin, higher-PG liquid flows through them easily.

• Best ratio: 50/50 (or higher PG)
• Why: Thin liquid wicks properly, gives a firm throat hit, and uses less liquid per puff.
• Good for: Beginners, ex-smokers, and anyone who wants a tight, cigarette-like draw.

Sub-Ohm Tanks and Direct-to-Lung (DTL) Devices

These high-powered devices have large coils with big wicking holes built for thick, high-VG liquid.

• Best ratio: 70/30 VG/PG or higher
• Why: Thick liquid saturates the large wicks properly and turns into big, smooth clouds.
• Warning: Putting thin 50/50 juice in a sub-ohm tank can cause it to leak out the airflow holes. And putting thick high-VG juice in a small pod causes dry, burnt hits because the liquid can’t wick fast enough.

VG/PG and Nicotine: How They Connect

The base ratio also ties into the kind of nicotine in your bottle:

• Freebase nicotine is the traditional type, found in both 50/50 and 70/30 blends. It gives a stronger throat hit, which gets harsher at higher strengths, so it’s usually sold at lower nicotine levels (0–18 mg).
• Nicotine salts (nic salts) are smoother at high strengths and are almost always mixed at a 50/50 ratio for small pod devices. They come in higher strengths (often 20–50 mg) and absorb faster, making them popular with heavier ex-smokers.

A simple rule: pod or starter device → start with 50/50 or a nic salt. Sub-ohm or cloud device → go with 70/30 freebase.

Are VG and PG Safe? Allergy and Sensitivity Considerations

Both VG and PG are widely used, food-grade ingredients recognized as safe for consumption by the FDA. That said, a few points are worth knowing:

• PG sensitivity is fairly common but usually mild. About 1 in 10 vapers have a slight sensitivity to PG that mainly shows up as a dry throat and slight irritation to the upper airways (estimates attributed to Dr. Paul Price, via E-Cigarette Direct). For many, this fades as they get used to vaping.
• Serious PG reactions are rarer. About 1 in 100 people are very sensitive to PG and will experience a very painful sore throat when using high-PG e-liquids (per E-Cigarette Direct / Versed Vaper). True PG allergies can cause skin rashes, hives, or swollen gums. If PG is the culprit, symptoms usually clear up after switching to a high-VG or Max VG e-liquid.
• VG sensitivity is extremely rare. Only around 1 in 1,000 people are sensitive to VG (per Versed Vaper). Those with soy or palm allergies should take extra care, since VG is often derived from those oils.
• Watch for confusion with quitting-smoking symptoms. Coughing, headaches, and dryness when you first start vaping can mimic a PG sensitivity but are often just your body adjusting after quitting cigarettes.

A note on the bigger picture: while VG and PG are proven safe to eat, the long-term effects of inhaling them as a heated aerosol are still being studied and aren’t fully understood. If you ever experience serious symptoms like difficulty breathing, stop and consult a doctor.

How to Choose the Right VG/PG Ratio for You

Putting it all together, here’s how to pick your ideal blend:

1. Start with your device. This is non-negotiable — match the ratio to your hardware first. Pod/MTL = 50/50; sub-ohm/DTL = 70/30 or higher.
2. Then think about your priority. Want maximum flavor and a strong throat hit? Lean toward higher PG. Want big clouds and a smooth inhale? Lean toward higher VG.
3. Factor in nicotine. Higher nicotine pairs better with higher-PG 50/50 blends (or nic salts); lower nicotine suits high-VG cloud blends.
4. Experiment. Finding your “sweet spot” often takes a little trial and error. If a blend feels too harsh, go higher VG. If flavor feels muted, go higher PG.

If you’re ever unsure, a 50/50 blend is the safest all-around starting point — it works in most devices and balances all three factors.

Shop Your Perfect VG/PG Blend at Ejuice Vape Distro

Now that you know exactly what VG and PG are and how the ratio shapes every puff, you can shop with confidence. At Ejuice Vape Distro, we carry a huge range of premium e-liquids across every VG/PG ratio — from balanced 50/50 nic salts made for pods to high-VG 70/30 freebase blends built for big clouds. Whether you’re chasing flavor, throat hit, or the fluffiest clouds possible, check the ratio on the label, match it to your device, and find the perfect bottle for your style.

Browse our full collection of vape juice and nicotine salts today and discover your ideal VG/PG match.