What Is VG in Vape Juice? Understanding E-Liquid Ratios
Table of Contents
- Introduction
- What is Vegetable Glycerin (VG)?
- The Physical Properties of VG
- VG vs. PG: The Essential Comparison
- How VG Affects Your Vaping Experience
- Matching VG Ratios to Your Hardware
- VG and Nicotine Types
- Temperature and VG Viscosity
- Coil Longevity and "Gunk"
- Proper Storage of High-VG E-Liquids
- Conclusion
- FAQ
Introduction
Every bottle of e-liquid contains a specific balance of ingredients that determines how your device performs and how the vapor feels. If you have ever looked at a label and noticed terms like "VG/PG" or "70/30," you are seeing the ratio of the two primary carrier liquids. Understanding what VG is and how it functions is essential for any adult vaper looking to optimize their experience. At Vapor Authority, we believe that knowing the components of your e-juice helps you make informed decisions about your hardware and flavor preferences.
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.
This article explores the characteristics of Vegetable Glycerin, its role in vapor production, and how to choose the right ratio for your specific setup. By the end of this guide, you will understand how VG levels affect everything from the thickness of your clouds to the longevity of your atomizer coils.
What is Vegetable Glycerin (VG)?
Vegetable Glycerin, commonly referred to as VG, is a clear, odorless, and relatively thick liquid. It belongs to the alcohol family chemically, but in a culinary and commercial sense, it is classified as a carbohydrate. VG is typically derived from plant oils, most commonly palm, soy, or coconut oil. Because it is derived from vegetable sources, it is a vegetarian-friendly ingredient used in a massive array of consumer products beyond the vaping industry.
In the United States, high-quality e-liquids use "USP Grade" Vegetable Glycerin. The USP designation stands for United States Pharmacopeia, which signifies a level of purity (usually 99% or higher) suitable for food, drug, or medicinal use. You will find VG in everything from cosmetics and lotions to baked goods and toothpastes. It acts as a humectant, meaning it helps products retain moisture.
In the context of vaping, VG serves as one of the two primary "base" liquids. Its natural properties—thickness, slight sweetness, and high boiling point—make it the ideal candidate for creating the visible vapor that users exhale. For a broader look at bottle options, you can browse our e-liquid collection.
The Physical Properties of VG
Understanding the physical nature of VG helps explain why it behaves the way it does inside a vape tank. There are three primary characteristics that define the VG experience: viscosity, sweetness, and vapor density.
Viscosity and Thickness
VG is significantly more viscous than its counterpart, Propylene Glycol (PG). Viscosity refers to a fluid's resistance to flow. Think of PG as having the consistency of water, while VG has a consistency closer to maple syrup or warm honey. This thickness is a defining factor in how the liquid moves from your tank's reservoir into the cotton wicking material inside your coil.
Natural Sweetness
Unlike PG, which is virtually tasteless, VG has a mild, natural sweetness. While this sweetness does not replace the need for added flavorings, it can influence the final taste profile of an e-liquid. For example, dessert and cream-flavored e-juices often benefit from high VG levels because the natural sweetness of the base complements the flavor notes.
Vapor Density
The most notable property of VG for most vapers is its ability to produce thick, voluminous clouds. When VG is heated by a coil, it creates a dense aerosol. The higher the percentage of VG in a bottle of e-juice, the thicker and more "solid" the vapor clouds will appear upon exhalation.
VG vs. PG: The Essential Comparison
To understand what VG does, it is helpful to contrast it with Propylene Glycol (PG). Most e-liquids use a combination of both to balance the strengths and weaknesses of each ingredient.
- Vapor Production: VG is the king of clouds. PG produces very little visible vapor.
- Flavor Carrying: PG is a superior solvent and flavor carrier. It carries complex flavor notes more effectively than the thicker VG.
- Throat Hit: PG provides the "throat hit" or "kick" that many adult vapers look for. VG is very smooth and has almost no throat-hit sensation.
- Viscosity: As mentioned, VG is thick and can clog small coils. PG is thin and wicks quickly into small apertures.
At Vapor Authority, we carry a wide variety of ratios to suit different preferences. Some users prefer a "Max VG" liquid for maximum smoothness, while others stick to a 50/50 ratio to ensure their smaller devices function correctly. If you want to compare popular options, our Best Sellers page is a useful place to start.
How VG Affects Your Vaping Experience
The amount of VG in your juice fundamentally changes how it feels to vape. Depending on your goals, you might want more or less of it in your rotation.
Smoothness and Throat Sensation
If you find that vaping feels too harsh on your throat, the culprit may be a high PG content. High-VG e-liquids are known for being incredibly smooth. Because VG is a thick humectant, it coats the throat rather than irritating it. This makes high-VG juices (70% or higher) the go-to choice for "Direct-to-Lung" (DTL) vapers who take large hits and want to avoid coughing or irritation.
Cloud Production
For "cloud chasers" or enthusiasts who enjoy the visual aspect of vapor, high VG is a requirement. In competitive vaping or high-power hobbyist circles, "Max VG" e-liquids are the standard. These liquids typically contain 80% to 90% VG, with the remaining percentage consisting of flavorings and nicotine, which are usually suspended in a small amount of PG.
Flavor Intensity
It is a common trade-off in the vaping world: more clouds usually mean slightly less flavor precision. Because VG is thick and slightly sweet, it can sometimes "mute" very delicate flavor notes. If you are a flavor purist who enjoys complex, multi-layered tobacco or floral notes, you might find that a ratio with a bit more PG (like 50/50 or 60/40) allows those notes to shine through more clearly.
Matching VG Ratios to Your Hardware
One of the most common mistakes new vapers make is using the wrong VG ratio for their device. This can lead to two main problems: leaking or "dry hits."
Sub-Ohm Tanks and High-Wattage Mods
Sub-ohm tanks are designed with large wicking ports—the holes in the side of the coil where the cotton is visible. These devices are built to handle thick liquids. If you use a high-VG juice (70/30 or 80/20) in a sub-ohm tank, the thick liquid will flow into the large ports at just the right speed.
If you use a very thin liquid (high PG) in these tanks, the liquid may flow too fast, flooding the coil and causing the tank to leak out of the airflow vents. You can see more hardware options in our sub-ohm tanks collection.
Pod Systems and MTL Devices
Mouth-to-Lung (MTL) devices and small pod systems generally have much smaller coils with tiny wicking ports. These devices are intended for thinner liquids. A 50/50 ratio is usually the "sweet spot" for these systems.
If you put a high-VG juice into a small pod, the liquid is too thick to soak into the cotton quickly. When you take a puff, the cotton stays dry, and the heating element burns the wick. This results in a "dry hit," which tastes like burnt paper and ruins the coil. For compact hardware options, check out our pod system starter kits.
A Note on Battery Safety
When using the high-wattage box mods often required to vaporize high-VG liquids, battery safety is paramount. Always inspect your external batteries (like 18650s) for any nicks or tears in the plastic wrap. Never carry loose batteries in your pocket or bag; always use a plastic protective case. Ensure you are using the correct charger and never leave charging batteries unattended. Proper battery maintenance ensures that your high-power vaping experience remains consistent and reliable.
VG and Nicotine Types
The type of nicotine you use often dictates the VG ratio you will encounter.
Freebase Nicotine
Standard freebase nicotine e-liquids are most commonly found in 70/30 or 80/20 VG/PG ratios. These are designed for sub-ohm vaping at lower nicotine strengths, such as 3mg or 6mg. Because the nicotine concentration is low, the smoothness of the VG allows for a comfortable experience even at high wattages.
Nicotine Salts
Nicotine salt e-liquids are generally designed for low-power pod systems. To ensure the liquid wicks properly in these small devices, most nicotine salts are mixed at a 50/50 ratio. This provides a balance of enough VG for vapor production and enough PG to keep the liquid thin and the flavor sharp. However, some manufacturers are now producing "Sub-Ohm Salt" variants which may feature higher VG levels. You can browse our nicotine salt e-liquids for more options.
Temperature and VG Viscosity
A practical tip for vapers is to be aware of how outside temperatures affect VG. Because it is an oil-based carbohydrate, Vegetable Glycerin reacts strongly to the cold. In winter months or cold climates, a 70/30 VG juice can become as thick as cold molasses.
If your device has been sitting in a cold car, give the liquid time to warm up to room temperature before vaping. Attempting to vape cold, thickened VG can lead to instant dry hits because the liquid cannot move through the wicking material. Conversely, in extreme heat, VG can thin out slightly, which might lead to minor leaking in some older tank designs.
Coil Longevity and "Gunk"
A frequent question we receive at Vapor Authority involves how VG affects the lifespan of an atomizer coil. While pure VG is clean-burning, the high-VG e-liquids on the market are often heavily sweetened with sucralose.
Because high-VG juices are used at higher temperatures, the sweeteners can "caramelize" on the coil. This creates a dark, crusty residue known in the community as "coil gunk." If you notice your vapor tasting "dark" or slightly burnt after only a few days, it is likely the combination of high VG and heavy sweeteners. To extend coil life, some vapers choose juices with slightly lower VG or those that contain no added sweeteners. Replacement parts are available in our replacement coils collection.
Proper Storage of High-VG E-Liquids
Regardless of the ratio, all e-juice should be stored correctly to maintain its integrity. VG is a stable substance, but the nicotine and flavorings mixed with it are sensitive to the environment.
- Keep it Cool: Avoid leaving your bottles in direct sunlight or hot environments. Heat can thin the liquid and cause the nicotine to oxidize faster.
- Darkness is Key: UV light breaks down nicotine and can change the color of your e-liquid from clear to dark amber.
- Seal Tight: Since VG is a humectant, it can actually absorb moisture from the air if the cap is left off. This can dilute the flavor and change the viscosity.
- Safety First: Always store e-liquids in a high, locked cabinet or a secure area away from children and pets. Even though VG itself is used in food, the nicotine content in e-liquid is toxic if swallowed.
Conclusion
Vegetable Glycerin is the backbone of the modern vaping experience, providing the smoothness and vapor density that many adults enjoy. By choosing a high-VG ratio, you prioritize thick clouds and a gentle throat hit, provided you have the sub-ohm hardware to support it. If you prefer a more discrete experience with a sharper throat hit, a lower VG ratio is likely your best path.
- VG (Vegetable Glycerin) is responsible for vapor density and smoothness.
- High VG (70%+) is best for sub-ohm tanks and large clouds.
- 50/50 Ratios are ideal for pod systems and smaller devices.
- Viscosity matters: Thicker juice requires larger wicking ports to prevent burnt hits.
Whether you are looking for high-VG clouds or a balanced 50/50 blend, we invite you to explore our curated selection. At Vapor Authority, we only stock 100% authentic, US-made e-liquids to ensure you receive the highest quality ingredients in every bottle. Learn more about our company on the About Us page.
FAQ
Does high VG juice cause coils to burn out faster?
VG itself does not necessarily burn out coils, but its thickness can lead to "dry hits" if used in a device with small wicking ports. Furthermore, high-VG juices are often paired with sweeteners that can caramelize on the heating element, creating a residue that shortens the life of the coil.
Can I use 100% VG e-liquid in any vape?
No, 100% VG (or "Max VG") is extremely thick and will not wick properly in most standard tanks or pod systems. It is generally reserved for rebuildable dripping atomizers (RDAs) where the user manually drips the liquid directly onto the cotton, or high-end sub-ohm tanks with exceptionally large juice ports. If you want to see more compact options, our disposable vapes collection is another place to explore.
Is VG the ingredient that provides the "throat hit"?
No, VG is actually responsible for making the vapor smoother. If you want a stronger throat hit, you should look for an e-liquid with a higher percentage of Propylene Glycol (PG) or a higher nicotine concentration, as VG is naturally very mild on the throat.
Why is my high-VG juice turning dark in the bottle?
While VG is clear, the nicotine and flavorings in the juice can oxidize over time when exposed to heat or light. This oxidation causes the liquid to turn a darker yellow or brown color. While this is a natural process, storing your juice in a cool, dark place will slow this down and preserve the flavor profile.
