Table of Contents
- Introduction
- The Fundamentals of Vegetable Glycerin (VG)
- The Four Key Roles of VG in Vape Juice
- VG vs. PG: Understanding the Trade-offs
- How VG Ratios Interact with Your Hardware
- Battery Safety for High-Wattage Vaping
- Common VG Ratios and What to Expect
- Why Quality Matters: US-Made E-Juice
- Maintenance and Storage Tips
- Conclusion
- FAQ
Introduction
If you have ever looked at a bottle of e-liquid, you likely noticed a ratio printed on the label, such as 70/30 or 50/50. These numbers refer to the balance between Vegetable Glycerin (VG) and Propylene Glycol (PG), the two primary base ingredients in nearly every vape juice on the market. Understanding what VG is and how it functions is essential for any vaper looking to optimize their experience, as it directly impacts vapor production, throat hit, and how well your device performs.
At Vapor Authority, we believe that the more you know about your e-liquid, the better your vaping experience will be. Every bottle we carry is manufactured in the USA using high-quality ingredients, but choosing the right one requires knowing which VG ratio fits your specific hardware. This guide will explain the technical properties of VG and help you determine which ratio is right for your preferred style of vaping. For more about who we are, visit our About Us page.
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.
The Fundamentals of Vegetable Glycerin (VG)
Vegetable Glycerin, commonly referred to as VG, is a thick, odorless, and clear liquid typically derived from plant oils such as soy, coconut, or palm oil. In the context of e-liquid, it serves as a carrier for nicotine and flavorings, but its primary job is to create the visible vapor you exhale. Because of its unique physical properties, it behaves very differently than its counterpart, Propylene Glycol.
VG has a naturally sweet taste and a high level of viscosity. Viscosity refers to the thickness or "flowability" of a liquid. Imagine the difference between water and honey; water has low viscosity, while honey has high viscosity. VG is much closer to the honey end of the spectrum. This thickness is a defining characteristic that dictates what kind of hardware you can use and how your coils will react to the juice.
The Four Key Roles of VG in Vape Juice
When you choose a high-VG e-liquid, you are prioritizing specific aspects of the vaping experience. There are four main areas where VG makes its presence known: vapor production, throat hit, flavor intensity, and juice thickness.
1. Vapor Production (The "Clouds")
If you enjoy producing large, dense clouds of vapor, you want a high concentration of VG. VG is responsible for the volume and density of the vapor produced when the liquid is heated by the coil. This is why "cloud chasers" or enthusiasts who participate in vapor competitions almost exclusively use e-liquids with 80% VG or higher. The thicker the liquid, the more robust the visible exhale becomes.
2. A Smoother Throat Hit
The "throat hit" is the sensation of tingling or slight irritation in the back of the throat that mimics the feeling of traditional smoking. While some vapers enjoy a sharp throat hit, many prefer a smoother, silkier experience. VG provides that smoothness. Because it is thicker and less "sharp" than PG, a higher VG ratio results in a much gentler sensation on the inhale, even at higher wattages.
3. Natural Sweetness and Flavor Muting
VG is naturally slightly sweet. While this can enhance dessert and fruit-flavored e-liquids, it can also slightly "mute" the intensity of the added flavorings. Propylene Glycol (PG) is a much better carrier for flavor. Therefore, an e-liquid with very high VG content may require more concentrated flavoring to achieve the same taste profile as a juice with a higher PG content.
4. Viscosity and Wicking
Because VG is thick, it moves through the wicking material (usually organic cotton) inside your coil much slower than PG. This is a critical technical point. If your juice is too thick for your specific coil, the cotton cannot soak up the liquid fast enough to keep up with the heat. This often leads to "dry hits," where the cotton burns because it isn't fully saturated.
VG vs. PG: Understanding the Trade-offs
To understand what VG means for your vape, you must compare it to Propylene Glycol (PG). Most e-liquids are a blend of both because they offer complementary benefits.
- Propylene Glycol (PG): This is a thin, watery liquid. It is an excellent flavor carrier and provides a stronger throat hit. However, it produces very little visible vapor.
- Vegetable Glycerin (VG): This is a thick, viscous liquid. It produces massive clouds and offers a very smooth inhale but can slightly mask flavor intensity.
By adjusting the ratio between these two, manufacturers can create liquids tailored for different types of vapers. For example, a 50/50 ratio is balanced and works well in small, low-power devices. A 70/30 ratio (70% VG and 30% PG) is the current industry standard for mid-to-high-power devices, offering a great balance of cloud production and flavor clarity.
How VG Ratios Interact with Your Hardware
One of the most common mistakes beginners make is using a high-VG juice in a device that isn't designed for it. Your hardware's ability to handle VG depends on the size of the "wicking ports" on your coil—the small holes where the juice enters the cotton.
Sub-Ohm Tanks and High-Power Mods
Sub-ohm vaping involves using a coil with a resistance below 1.0 ohm. These devices are designed to operate at higher wattages and have large wicking ports. Because they vaporize a lot of liquid quickly, they need the thickness of VG to prevent the tank from leaking. A thin, high-PG liquid would likely run right through a sub-ohm coil and out of the airflow holes. For these setups, a tank like the SMOK T-Air Sub Ohm Tank is a strong example of hardware built for thicker blends.
Pod Systems and Mouth-to-Lung (MTL) Tanks
Smaller devices, such as pod systems or MTL tanks, use coils with higher resistance (above 1.0 ohm) and smaller wicking ports. These devices operate at much lower wattages. If you put a high-VG (thick) liquid into a small pod, the liquid will struggle to enter the small holes. This results in the coil burning out prematurely. For these devices, a 50/50 ratio or a maximum of 60% VG is generally recommended, especially with nicotine salt e-liquids.
Rebuildable Atomizers (RDA and RTA)
For experienced vapers using RDAs (Rebuildable Dripping Atomizers) or RTAs (Rebuildable Tank Atomizers), the VG ratio is a matter of personal preference and build style. Because you are often manually dripping liquid onto the coils or controlling the wicking yourself, you can use "Max VG" liquids that contain very little PG. These setups are optimized for massive vapor production and are common among enthusiasts.
Battery Safety for High-Wattage Vaping
When using high-VG e-liquids, you are typically vaping at higher wattages to properly vaporize the thicker liquid. This puts more demand on your batteries. Whether you are using a built-in battery device or a box mod with external 18650 or 21700 batteries, safety is paramount. If you are shopping for a power-focused setup, browse SMOK starter kits for compact hardware options.
To maintain your equipment properly:
- Inspect Wraps: Always check the plastic "wrap" on your external batteries. If there are any nicks, tears, or exposed metal, do not use the battery.
- Use Proper Cases: Never carry loose batteries in your pocket or bag. They can short circuit if they touch keys or coins. Always use a dedicated plastic battery case.
- Matched Pairs: In dual-battery mods, use "married" pairs—batteries of the same brand and model that are always charged and used together.
- External Charging: While many mods allow for USB charging, we recommend using a high-quality external charger for more consistent and safer charging of external batteries.
Common VG Ratios and What to Expect
When shopping at Vapor Authority, you will encounter several standard ratios. Here is a breakdown of what each one provides:
50VG / 50PG
This is the most balanced ratio. It provides a noticeable throat hit and sharp flavor. It is most commonly found in nicotine salt e-liquids and is perfect for pod systems like the ones made by SMOK or Vaporesso.
70VG / 30PG
This is the "sweet spot" for the majority of modern vapers. It is thick enough to produce impressive clouds and prevent leaking in sub-ohm tanks, yet thin enough to provide excellent flavor. It is the standard ratio for most "freebase" nicotine e-liquids.
80VG / 20PG and Higher
These are specialized liquids for cloud chasing. They are very thick and very smooth. You will need a high-powered mod and a tank with large wicking ports to use these effectively. For a matching hardware category, see Vaporesso tanks.
Max VG
"Max VG" does not necessarily mean 100% VG. It means the manufacturer used as much VG as possible, but some PG may still be present because most concentrated flavorings are suspended in a PG base. These are designed for maximum smoothness and the largest possible clouds.
Why Quality Matters: US-Made E-Juice
Not all Vegetable Glycerin is created equal. The grade of the ingredients determines the purity and quality of the final product. At Vapor Authority, we only carry e-liquids that are manufactured in the United States using food-grade and pharmaceutical-grade ingredients. Our vape juice collection includes a wide range of brands that fit different VG/PG preferences.
Lower-quality VG can have a chemical aftertaste or contain impurities that affect the lifespan of your coils. Premium US-made brands like Naked 100, Coastal Clouds, and Five Pawns use high-purity USP-grade VG. This helps preserve the intended flavor profile of the juice. One example is Coastal Clouds e-liquid, which shows how brand quality can shape the finished blend.
Maintenance and Storage Tips
Because VG is an organic substance, it can change over time if not handled correctly. Proper storage will keep your high-VG juice fresh and prevent it from thinning out or losing flavor.
- Temperature Sensitivity: High-VG liquids can become extremely thick in cold weather, which can lead to dry hits. In very hot weather, they can thin out, potentially causing leaks. Always try to keep your juice at room temperature.
- Sunlight: Direct UV rays can break down the nicotine and flavorings in your e-liquid. Store your bottles in a cool, dark place, such as a drawer or a dedicated storage case.
- Shake Before Use: Because VG and PG have different densities, they can sometimes separate slightly if a bottle has been sitting for a long time. A quick shake ensures the ratio is consistent when you fill your tank.
- Coil Life: High-VG juices are thicker and often contain more sweeteners. This means your coils might not last as long as they would with a high-PG juice. If you need replacements, check the replacement coils collection.
Conclusion
Vegetable Glycerin (VG) is the powerhouse behind the clouds and smoothness of your vaping experience. By choosing the right VG ratio, you can tailor your vape to be either a punchy, flavor-forward experience or a smooth, cloud-heavy one. Always remember to match your e-liquid ratio to your hardware: use high VG for sub-ohm tanks and balanced 50/50 ratios for smaller pod systems.
To find the perfect balance for your device, explore our extensive collection of premium, US-made e-liquids. Whether you prefer the massive clouds of a 70/30 blend or the discreet performance of a 50/50 salt nic, we have the authentic products you need to enjoy a consistent experience. If you're browsing for new hardware, our Vaporesso starter kits are a solid place to start.
FAQ
Does high VG juice make your coils burn out faster?
High VG juice is thicker and often contains more sweeteners, which can lead to a buildup of "gunk" on the coil over time. If your device isn't designed with large enough wicking ports to handle the thickness, the cotton may not saturate quickly enough, leading to dry hits and a burnt coil.
Can I use 100% VG e-liquid in any vape?
No, 100% VG (or Max VG) is very thick and is generally only suitable for Rebuildable Dripping Atomizers (RDAs) or specific high-performance sub-ohm tanks. Most standard pod systems and starter kits will struggle to wick such a thick liquid, resulting in poor performance and burnt coils.
Is VG responsible for the sweetness in my vape juice?
Yes, Vegetable Glycerin has a mild, natural sweetness. While it doesn't replace the need for added sweeteners in dessert flavors, it does contribute to the overall flavor profile and can make fruit and cream flavors taste richer compared to high-PG liquids.
Why is my high-VG juice leaking from my tank?
Leaking is actually less common with high-VG juice because it is thick. If your tank is leaking with a high-VG liquid, it is likely due to a worn-out O-ring, a flooded coil, or extreme heat thinning the liquid out. Usually, leaking is a sign that the liquid is too thin for the tank, which happens when using high-PG juice in sub-ohm hardware.
