Table of Contents
- Introduction
- What is Propylene Glycol (PG)?
- What is Vegetable Glycerin (VG)?
- Comparing PG and VG Ratios
- How Your Device Affects Your Choice
- Nicotine Types and Their Relationship to Ratios
- Practical Tips for Choosing Your Ratio
- Battery Safety for Mod Users
- Storage and Handling of E-Liquid
- Conclusion
- FAQ
Introduction
Choosing the right e-liquid involves more than just picking a flavor that sounds appealing. The balance of PG and VG in your juice determines the intensity of the throat hit and the volume of vapor produced. At Vapor Authority, we believe that understanding these two primary ingredients is essential for any vaper looking to optimize their experience. This guide explains how these components work together to help you find the ideal ratio for your specific hardware and 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.
What is Propylene Glycol (PG)?
Propylene Glycol, commonly referred to as PG, is one of the two main base ingredients in vape juice. It is a synthetic organic compound that is colorless and nearly odorless. PG is widely used in various industries. You can find it in food products, pharmaceuticals, and even theatrical fog machines. In the context of vaping, PG serves as a primary carrier for flavor and nicotine.
Properties of PG
PG has a very thin, watery consistency. This low viscosity is important for how it interacts with your vaping hardware. Because it is thin, it is easily absorbed by the wicking material inside your atomizer coil. This makes it less likely to cause "dry hits," which occur when the wick is not saturated enough. PG also has a lower boiling point than its counterpart, VG.
Flavor and Throat Hit
One of the most significant characteristics of PG is its ability to carry flavor. It is virtually tasteless on its own. This allows the concentrated flavorings in the e-liquid to stand out clearly. Furthermore, PG provides the "throat hit" that many former smokers look for. A throat hit is the slight tingling or rasping sensation in the back of the throat during inhalation. E-liquids with a higher PG content deliver a more pronounced throat hit.
What is Vegetable Glycerin (VG)?
Vegetable Glycerin, or VG, is the second primary base ingredient found in e-liquid. Unlike PG, VG is a natural chemical derived from vegetable oils, such as soy, coconut, or palm oil. It is a thick, viscous liquid that has a slightly sweet taste. VG is also used in many consumer goods. It appears in cosmetics, sweeteners, and various food items. For more options across this category, browse the e-liquid collection.
Properties of VG
VG is much thicker than PG. Its high viscosity means it flows more slowly. This can affect how quickly it saturates the cotton wick in your coil. Because it is thicker, it requires more heat to vaporize efficiently. This is why high-VG liquids are typically paired with more powerful devices and lower-resistance coils.
Vapor Production and Smoothness
The main appeal of VG is its ability to produce large, dense clouds of vapor. If you enjoy seeing significant vapor production, you will likely prefer a higher VG ratio. VG also provides a much smoother sensation on the throat. It lacks the sharp "hit" associated with PG. This makes it a popular choice for vapers who use high-wattage devices and prefer a direct-to-lung (DTL) vaping style. DTL vaping involves inhaling vapor directly into the lungs, similar to taking a deep breath.
Comparing PG and VG Ratios
Most e-liquids are not made of pure PG or pure VG. Instead, they use a blend of both to balance flavor, throat hit, and vapor production. The most common ratios you will encounter at Vapor Authority include 50/50, 70/30, and 80/20.
The 50/50 Blend
A 50/50 ratio provides an equal balance of PG and VG. This blend is often considered the industry standard for versatility. It provides a decent throat hit while still producing a visible amount of vapor. The flavor remains sharp and clear. This ratio is ideal for mouth-to-lung (MTL) vaping. MTL vaping is a technique where you draw vapor into your mouth first before inhaling it into your lungs.
The 70/30 Blend
A 70/30 ratio (70% VG and 30% PG) is the most popular choice for modern sub-ohm vaping. Sub-ohm vaping refers to using an atomizer coil with a resistance of less than 1.0 ohm. This ratio offers a smooth inhale and significant cloud production. Because there is still 30% PG, the flavor remains vibrant. It is thick enough to prevent leaking in most sub-ohm tanks but thin enough to wick properly in most mid-range devices. A tank like the SMOK T-Air Sub Ohm Tank is built for this style of setup.
High VG and Max VG Blends
Ratios like 80/20 or "Max VG" are designed for enthusiasts and "cloud chasers." These liquids are very thick and produce massive amounts of vapor. Max VG does not mean 100% VG. It usually means the manufacturer used the maximum amount of VG possible while still including the PG-based flavor concentrates. These blends are very smooth but can sometimes have a slightly muted flavor profile compared to higher-PG juices.
How Your Device Affects Your Choice
Your hardware plays a critical role in determining which PG/VG ratio you should use. Using the wrong ratio can lead to a poor experience. This might include leaking, burnt coils, or a lack of flavor.
Pod Systems and High-Resistance Coils
Small pod systems and devices using coils with a resistance above 1.0 ohm are generally designed for thinner liquids. These devices often have small wicking ports. If you use a high-VG liquid in these devices, the juice may be too thick to enter the coil quickly. This results in the cotton burning, which creates a harsh, acrid taste. For these setups, a 50/50 ratio or a 60/40 ratio is usually the best choice. For low-output setups, nicotine salt e-liquids are a natural match.
Sub-Ohm Tanks and Box Mods
Sub-ohm tanks are built with large wicking holes and high-airflow designs. They are intended for use at higher wattages. If you use a high-PG (thin) liquid in these tanks, the juice may flow too quickly. This often leads to leaking through the airflow vents or "spit-back." Spit-back occurs when excess liquid sits on the coil and "pops" into your mouth when heated. For sub-ohm tanks, we recommend a minimum of 70% VG. A setup built around the Vaporesso NRG-S Sub Ohm Tank pairs well with that ratio.
Rebuildable Atomizers (RDA and RTA)
Rebuildable Dripping Atomizers (RDAs) and Rebuildable Tank Atomizers (RTAs) offer the most flexibility. Since you install your own cotton and coils, you can often adjust your wicking technique to accommodate different ratios. However, most rebuildable users prefer 70/30 or higher VG ratios to take advantage of the high power these devices can handle.
Nicotine Types and Their Relationship to Ratios
The type of nicotine in your e-liquid also influences the PG/VG balance. There are two main types: freebase nicotine and nicotine salts.
Freebase Nicotine
Freebase nicotine is the traditional form of nicotine used in vaping. It is usually found in ratios like 70/30 or 80/20. Because freebase nicotine can be harsh at higher concentrations, it is typically sold in low strengths like 3mg or 6mg. These are designed for high-VG blends used in high-wattage devices.
Nicotine Salts
Nicotine salts are a different chemical formulation that allows for higher nicotine concentrations without the harsh throat hit. Nicotine salt e-liquids are almost always blended at a 50/50 ratio. This is because they are intended for use in low-power pod systems. The thinner consistency ensures the small coils can wick efficiently. If you prefer this style of liquid, the nicotine salt e-liquids collection is a useful place to start.
Practical Tips for Choosing Your Ratio
To find your perfect balance, consider your personal priorities. If you are focused on flavor clarity and a strong throat hit, look for higher PG levels. If you want a smooth experience with large clouds, choose higher VG levels.
Always check your coil's "wicking ports." These are the holes where the cotton is visible. If the holes are very small (the size of a pinhead), stick to 50/50. If the holes are large (the size of a pea), 70/30 or higher is appropriate. At Vapor Authority, we carry a wide range of US-made e-liquids in various ratios to suit every device we sell.
Battery Safety for Mod Users
If you are using a box mod or high-wattage device to enjoy high-VG liquids, battery safety is paramount. High-VG vaping often requires more power, which puts more demand on your batteries. A device like the Vaporesso Gen S 220W Box Mod is built for that kind of setup.
- Inspect Wraps: Always check the plastic wrap on your external batteries (like 18650s). If there is a tear or nick, do not use the battery.
- Use a Case: 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.
- Proper Charging: Use a high-quality external charger rather than charging through the device’s USB port whenever possible. This ensures a more balanced and safe charge.
- Match Your Batteries: If your device uses two or more batteries, keep them "married." This means using the same brand and model, purchased at the same time, and always charging/discharging them together.
Storage and Handling of E-Liquid
Properly storing your e-liquid ensures the PG/VG ratio and nicotine stay stable over time. Heat and light are the primary enemies of e-juice.
- Keep it Cool and Dark: Store your bottles in a cupboard or drawer away from direct sunlight. Sunlight can degrade nicotine and cause the color of the liquid to darken.
- Keep Out of Reach: Always store e-liquids where children and pets cannot access them. All e-liquids we sell feature child-resistant caps, but safety should always come first.
- Check Consistency: Over time, e-liquid may thicken or thin slightly if exposed to extreme temperatures. If your juice has been in a cold car, let it reach room temperature before vaping to ensure the viscosity is correct for wicking.
Conclusion
Understanding the difference between PG and VG is the key to a consistent and enjoyable vaping experience. PG provides the flavor and throat hit, while VG provides the smoothness and vapor density. By matching your e-liquid ratio to your specific device and personal preferences, you can avoid common issues like leaking or burnt coils. Whether you prefer the sharp flavor of a 50/50 blend or the massive clouds of a 70/30 mix, choosing high-quality, US-made liquids is essential. If you want to learn more about the company behind the store, visit the About Us page.
- PG (Propylene Glycol) is thin, carries flavor well, and provides a throat hit.
- VG (Vegetable Glycerin) is thick, produces large clouds, and is smooth on the throat.
- Device Matching is vital; use thinner juice for small pods and thicker juice for sub-ohm tanks.
- Nicotine Type usually dictates the ratio; salts are typically 50/50, while freebase is often 70/30.
Browse our extensive collection of premium e-liquids at Vapor Authority to find the perfect PG/VG ratio for your setup. All of our juices are manufactured in the USA using high-quality ingredients, and our team is always available to help you make the right choice, subject to state regulations.
FAQ
Can I use 100% VG e-liquid in a pod system?
Generally, no, you should avoid using 100% VG or very high-VG liquids in a pod system. The thick consistency of VG will struggle to enter the small wicking ports of pod coils. This usually results in the cotton wick burning quickly. For most pod systems, a 50/50 or 60/40 PG/VG ratio is recommended for optimal performance.
Why does my vape juice taste burnt when using high-VG liquid?
A burnt taste often occurs because the e-liquid is too thick for your coil to absorb quickly enough. If the coil heats up but the wick is not fully saturated with juice, the cotton itself will burn. This is common when using 70/30 or 80/20 ratios in low-power devices with small coils. Switching to a higher PG ratio can often solve this problem.
Does the PG/VG ratio affect how long my coil lasts?
Yes, the ratio can significantly impact coil longevity. High-VG liquids are often sweeter and thicker, which can lead to "coil gunk" or residue buildup on the heating element. Furthermore, if a liquid is too thick for the coil to wick properly, it will cause premature burning. Using the correct ratio for your specific tank and wattage setting is the best way to extend coil life.
Is it possible to be allergic to PG or VG?
While rare, some individuals have a sensitivity or allergy to Propylene Glycol (PG). Symptoms can include an uncomfortably sore throat, skin rashes, or sinus irritation. If you experience these symptoms, you might consider trying a "Max VG" or 100% VG e-liquid. True allergies to Vegetable Glycerin (VG) are extremely rare, as it is a substance naturally processed by the human body.
