Table of Contents
- Introduction
- What is Vegetable Glycerin (VG)?
- What is Propylene Glycol (PG)?
- Comparing the Two: Thick vs. Thin
- Understanding Common PG/VG Ratios
- Matching Your Ratio to Your Hardware
- Nicotine Types and Ratios
- Troubleshooting PG/VG Issues
- Quality Standards and Storage
- Conclusion
- FAQ
Introduction
When you first start exploring the world of e-liquids, the technical shorthand can feel overwhelming. Among the most important terms you will encounter are VG and PG. These two ingredients make up the vast majority of every bottle of vape juice, serving as the carrier liquids for nicotine and flavoring. Understanding the balance between these two components is essential for tailoring your experience to your specific preferences.
At Vapor Authority, we believe that informed vapers are more likely to find the setup that works best for them. The ratio of these two ingredients determines everything from the thickness of the vapor clouds to the intensity of the "throat hit" you feel when inhaling. This guide explains exactly what these substances are and how to choose the right ratio for your hardware and personal tastes.
Warning: This content is intended for adults of legal vaping age only. Vaping products contain nicotine, which is an addictive chemical. These products are not intended for use by minors, non-smokers, pregnant or breastfeeding women, people with heart conditions, high blood pressure, or asthma. Consult a physician if you have concerns about whether vaping products are appropriate for you.
What is Vegetable Glycerin (VG)?
Vegetable Glycerin, commonly referred to as VG, is a thick, odorless, and clear liquid typically derived from plant oils such as palm, soy, or coconut. In the context of vape juice, VG is responsible for the density and volume of the vapor produced. Because it has a high viscosity—meaning it is quite thick—it requires more heat to vaporize effectively compared to its counterpart, PG.
VG has a slightly sweet natural taste, which can sometimes subtly enhance dessert or fruit-flavored e-liquids like Pango E-Juice by Vapetasia. However, because it is so thick, it can be harder for the cotton wicks inside your atomizer to absorb quickly. If you use a high-VG liquid in a small device with tiny wicking holes, you may experience "dry hits," which occur when the coil burns the cotton because the liquid hasn't reached it fast enough.
From a sensory perspective, VG is known for providing a very smooth inhale. It does not provide much of a "throat hit," which is the tingling or slightly abrasive sensation in the back of the throat that many people associate with traditional smoking. This makes high-VG liquids a popular choice for "cloud chasers" or those who prefer a Direct-to-Lung (DTL) vaping style. DTL vaping involves inhaling the vapor directly into the lungs, much like taking a deep breath, which is made more comfortable by the smoothness of VG.
What is Propylene Glycol (PG)?
Propylene Glycol, or PG, is a synthetic liquid that is much thinner and less viscous than VG. It is odorless and tasteless, which makes it an excellent carrier for food-grade flavorings. Because PG does not have the natural sweetness of VG, it allows the intricate notes of your e-liquid’s flavor profile to stand out more sharply. Most of the flavor concentrates used in the industry are actually suspended in a PG base.
The most notable characteristic of PG is the "throat hit" it provides. For many adult vapers, this sensation is a vital part of the experience. PG is also much more efficient at carrying nicotine, making it the preferred base for those who use higher nicotine strengths. Because it is thin, it is absorbed very quickly by the wicks in your coil, making it ideal for smaller devices and Mouth-to-Lung (MTL) setups. MTL vaping involves drawing the vapor into the mouth first before inhaling it into the lungs, similar to how one might use a cigar or a traditional cigarette.
It is worth noting that a very small percentage of the population may have a sensitivity to PG, which can manifest as a dry throat or slight irritation. If you find that high-PG liquids are consistently uncomfortable, switching to a higher VG ratio often resolves the issue.
Comparing the Two: Thick vs. Thin
The easiest way to visualize the difference between these two ingredients is by looking at their physical properties. VG is like a thick syrup, while PG has a consistency closer to water. This physical difference dictates how the liquid behaves inside your vape tank.
When these two are mixed, they create the "base" of your e-liquid. A 50/50 ratio means the liquid is half VG and half PG. This provides a balance of decent vapor production and a noticeable throat hit. As the percentage of VG increases (such as a 70/30 or 80/20 ratio), the liquid becomes thicker, the clouds become larger, and the throat hit becomes softer.
Conversely, if you increase the PG, the liquid becomes thinner. This is beneficial for older style tanks or modern pod systems that use high-resistance coils. High-resistance coils (typically 1.0 ohm or higher) have smaller passages for the juice to enter. If the juice is too thick, it can't get inside the coil fast enough, leading to a burnt taste and a ruined coil.
Understanding Common PG/VG Ratios
Most e-liquids you find at Vapor Authority will fall into one of several standard ratio categories. Understanding what these numbers mean on the label will help you avoid buying the wrong juice for your device.
50/50 PG/VG Ratio
This is often considered the industry standard for "all-purpose" vaping, particularly for those using nicotine salt e-liquids or pod systems. It provides an equal balance. You get enough PG to carry a strong flavor and provide a satisfying throat hit, combined with enough VG to produce a visible and consistent amount of vapor. This ratio is also the most common for nicotine salt e-liquids, which are designed for low-output devices.
70/30 VG/PG Ratio
This is the most popular ratio for sub-ohm vaping. A sub-ohm setup uses a coil with a resistance of less than 1.0 ohm. These devices operate at higher wattages and produce more heat. The 70% VG content allows for large, dense clouds that sub-ohm vapers enjoy, while the 30% PG ensures the flavor remains crisp and the liquid isn't so thick that it causes wicking issues.
80/20 and Max VG
"Max VG" does not mean 100% VG; rather, it means the manufacturer has added as much VG as possible, with the only PG in the bottle coming from the flavor concentrates themselves. These liquids are extremely thick and are generally reserved for Rebuildable Dripping Atomizers (RDAs). In an RDA, you manually drip the juice onto the coils, so you don't have to worry about the liquid traveling through small wicking ports. These are for enthusiasts who prioritize massive vapor production above all else.
Matching Your Ratio to Your Hardware
The device you use is the most important factor in determining which PG/VG ratio you should buy. Using the wrong ratio can lead to two main problems: leaking or dry hits.
Pod Systems and Starter Kits
Most compact pod systems are designed for thinner liquids. Because the coils in these devices are small, they cannot process thick, high-VG juices quickly. If you use an 80/20 VG/PG juice in a small pod, the coil will likely burn out within a day. For these devices, a 50/50 ratio or a 60/40 VG/PG ratio is usually the "sweet spot." These thinner liquids flow easily into the small wicking holes, ensuring the cotton stays saturated.
Sub-Ohm Tanks and Box Mods
Sub-ohm tanks are the high-performance engines of the vaping world. They have large wicking ports and are designed to be used at high wattages. If you put a thin, high-PG liquid into a sub-ohm tank, it may be too runny. The liquid can flow through the coil and out of the airflow vents, leading to messy leaks. These tanks perform best with 70/30 or 80/20 VG/PG ratios. The thickness of the VG helps keep the liquid contained within the tank while the high wattage easily vaporizes the dense fluid.
For readers comparing hardware options, the Vape Mods collection is a natural place to start, and a setup like the Vaporesso GEN MAX 220W Starter Kit shows how starter kits can pair with different tank styles.
Battery Safety for High-Wattage Users
If you are using high-VG liquids, you are likely using a box mod powered by external batteries, such as 18650 or 21700 cells. It is vital to handle these batteries with care. Always inspect the plastic wraps on your batteries; if you see any nicks or tears, do not use the battery, as this can cause a short circuit. Never carry loose batteries in your pocket or bag where they could touch metal objects like keys or coins. Use a dedicated plastic battery case for storage. Additionally, always use a high-quality external charger rather than relying solely on the device's USB port, and ensure your batteries are "married" (purchased together and used together) if your mod requires more than one cell.
Nicotine Types and Ratios
The type of nicotine in your juice often dictates the PG/VG ratio. There are two primary types of nicotine used in the industry: freebase nicotine and nicotine salts.
Freebase nicotine is the traditional form of nicotine. It is typically found in 0mg, 3mg, 6mg, and 12mg strengths. Because these are often used in sub-ohm devices at higher wattages, freebase juices usually have a higher VG content, such as 70/30 or 80/20.
Nicotine salts are a different formulation that allows for much higher nicotine concentrations (such as 25mg or 50mg) without the harsh throat hit that would normally accompany such high levels. Because nicotine salts are meant to be used in low-power, high-resistance devices, they are almost exclusively mixed at a 50/50 ratio. This ensures the liquid is thin enough for pod systems while delivering the nicotine efficiently.
Troubleshooting PG/VG Issues
If you are experiencing a less-than-ideal vape, the ratio might be the culprit. Here are some common scenarios:
- Leaking from Airflow Holes: If your tank is leaking, your juice might be too thin (too much PG) for the size of your coil's wicking ports. Try switching to a 70/30 VG/PG ratio to see if the increased thickness stops the leaking.
- Burnt Taste or "Dry Hits": This often happens when the juice is too thick (too much VG) to keep up with your vaping speed. If you are using a pod system, switch to a 50/50 ratio. If you are using a sub-ohm tank, you might need to lower your wattage or wait longer between puffs to allow the thick liquid to soak in.
- Lack of Flavor: If the flavor feels "muted," you might be using a ratio that is too high in VG. Since PG is the superior flavor carrier, choosing a liquid with slightly more PG (like moving from 80/20 to 70/30) can often sharpen the taste.
- Excessive Coughing or Harshness: This is usually a sign of too much PG or too high a nicotine strength. Try a higher VG ratio to smooth out the inhale.
If you need replacement hardware, replacement coils are often the next item to check when wicking or coil performance changes.
Quality Standards and Storage
At Vapor Authority, we only carry e-liquids manufactured in the USA using food-grade and pharmaceutical-grade ingredients. This ensures that the VG and PG in your bottle meet strict purity standards. Regardless of the ratio you choose, proper storage is key to maintaining the quality of your vape juice.
Heat, light, and air are the enemies of e-liquid. Over time, exposure to these elements will cause the nicotine to oxidize (turning the liquid darker) and the flavorings to degrade. Always store your e-liquid in a cool, dark place, such as a cupboard or drawer. Ensure the child-proof caps are tightened firmly after every use, and always keep your bottles out of reach of children and pets.
Conclusion
Choosing the right VG/PG ratio is one of the most effective ways to customize your vaping experience. Whether you want a smooth, cloud-heavy session with a high-VG liquid or a sharp, flavorful, and tactile experience with high-PG, the choice depends on your personal preference and the hardware you use.
To summarize:
- VG (Vegetable Glycerin) is thick, sweet, and produces large, smooth clouds. It is best for sub-ohm tanks and DTL vaping.
- PG (Propylene Glycol) is thin, carries flavor exceptionally well, and provides a "throat hit." It is best for pod systems and MTL vaping.
- 70/30 VG/PG is the standard for most modern mods and sub-ohm setups.
- 50/50 VG/PG is the standard for pod systems and nicotine salts.
If you are looking for a broader starting point, the Vape Juice & E-Liquids collection brings together a wide range of bottles, while the Smok Mag Solo 100W Starter Kit and Vaporesso Cascade Sub Ohm Tank show how the right hardware can shape the way different ratios perform.
FAQ
What is the best PG/VG ratio for flavor?
Generally, a higher PG ratio (such as 50/50 or 60/40) provides the most intense flavor because Propylene Glycol is a more effective carrier for flavor concentrates than Vegetable Glycerin. While high-VG liquids can still taste great, the natural sweetness and thickness of VG can sometimes slightly mute the complexity of certain flavor profiles.
Why does my vape juice turn dark over time?
This is usually caused by the oxidation of nicotine, which is a natural process that happens when the liquid is exposed to light, heat, or oxygen. While the ratio of VG to PG doesn't directly cause this, the ingredients in the juice can react over time. Storing your juice in a cool, dark place will significantly slow down this darkening process.
Can I mix two different PG/VG ratios together?
Yes, you can mix e-liquids with different ratios as long as the flavor profiles complement each other. For example, mixing a 50/50 juice with a 70/30 juice of the same flavor will result in a 60/40 ratio. This is a common way for vapers to "fine-tune" the thickness of their liquid to better suit a specific tank or pod system.
Is one ratio better for people with sensitive throats?
If you find vaping to be too harsh or if it makes you cough, a high-VG ratio (70% or higher) is usually the best choice. VG provides a much smoother inhale with almost no throat hit. Conversely, if you feel like you aren't getting enough of a "kick," increasing the PG content will provide that familiar tactile sensation in the throat.
