Table of Contents
- Introduction
- The Four Core Ingredients
- Propylene Glycol (PG): The Flavor Carrier
- Vegetable Glycerin (VG): The Vapor Producer
- Understanding PG/VG Ratios and Hardware
- The Role of Nicotine
- Flavorings: Creating the Profile
- The Manufacturing Standard: Why US-Made Matters
- Storage and E-Liquid Longevity
- The Importance of Steeping
- Summary of Ingredient Functions
- Conclusion
- FAQ
Introduction
Understanding exactly what is in your e-liquid is a fundamental part of being a responsible and informed vaper. While the clouds and flavors are the most visible aspects of the experience, the chemistry behind the liquid determines everything from the throat hit to the longevity of your coils. At Vapor Authority, we prioritize transparency and quality, ensuring that every bottle we carry meets rigorous standards for adult vapers.
Knowing these ingredients helps you troubleshoot performance issues and customize your setup for the best possible results. Whether you prefer a discrete mouth-to-lung experience or massive vapor production, the composition of your e-liquid is the primary factor. This guide provides a detailed breakdown of the components found in modern e-liquids and how they interact with your hardware.
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 Four Core Ingredients
Most e-liquids are comprised of just four main ingredients: Propylene Glycol (PG), Vegetable Glycerin (VG), nicotine, and flavorings. While some specialty liquids may omit nicotine or adjust the ratios of the other three, this quartet forms the foundation of the industry.
Every e-liquid collection we offer at Vapor Authority is manufactured in the USA using food-grade and pharmaceutical-grade ingredients. This ensures that the base liquids and additives are of the highest purity possible. By focusing on US-made products, we ensure that the manufacturing processes occur in controlled environments, such as ISO-certified cleanrooms.
Propylene Glycol (PG): The Flavor Carrier
Propylene Glycol, commonly referred to as PG, is a colorless and odorless liquid. It is a synthetic compound that is widely used in a variety of industries, including food, cosmetics, and pharmaceuticals. In the context of e-liquid, PG serves several critical functions.
Consistency and Wicking
PG has a very thin, watery consistency. This low viscosity is essential for certain types of hardware, particularly smaller pod systems and starter kits. Because it is thin, PG can easily travel through small wicking ports in an atomizer coil. This prevents "dry hits," which occur when the wick cannot saturate fast enough to keep up with the heating element.
Throat Hit
One of the most notable characteristics of PG is the "throat hit" it provides. This is the slight tingling sensation in the back of the throat during inhalation. For many adult vapers, this sensation is a key part of the experience. High-PG liquids (such as those with a 50/50 or 60/40 ratio) are designed to maximize this tactile feedback.
Flavor Intensity
PG is an excellent solvent and carrier for flavorings. It does not have a distinct taste of its own, meaning it does not interfere with the intended profile of the e-liquid. Liquids with a higher PG content often have sharper, more defined flavor notes compared to high-VG alternatives.
Vegetable Glycerin (VG): The Vapor Producer
Vegetable Glycerin, or VG, is a natural chemical derived from vegetable oils, typically palm, soy, or coconut oil. It is significantly thicker and more viscous than PG, resembling the consistency of syrup or honey.
Vapor Production
VG is the ingredient responsible for the density and volume of the vapor produced. If you see a vaper creating large, thick clouds, they are likely using a high-VG e-liquid. Because VG is thick, it requires more power (wattage) to atomize effectively. This is why high-VG liquids are almost exclusively used in sub-ohm tanks and high-wattage box mods.
Natural Sweetness
Unlike PG, VG has a mild natural sweetness. While this can complement dessert and fruit flavors, it can also slightly "mute" complex flavor notes. Vapers who use high-VG liquids often find that the flavor is smoother and more rounded, rather than sharp.
Smoothness
Because VG lacks the "bite" of PG, it provides a much smoother inhalation experience. This is ideal for vapers who find high-PG liquids too harsh on the throat. However, the high viscosity means that the e-liquid takes longer to soak into the cotton wick. If the wick isn't fully saturated, the heat from the coil can singe the cotton.
Understanding PG/VG Ratios and Hardware
The ratio of PG to VG is usually printed clearly on the label of the e-liquid bottle. Choosing the right ratio is perhaps the most important decision you can make regarding your hardware’s performance.
50/50 Ratios
A 50/50 ratio provides an equal balance of PG and VG. These liquids are best suited for low-wattage devices, such as pod systems or mouth-to-lung (MTL) tanks. The thinner consistency ensures the small coils can wick properly, while the PG provides a satisfying throat hit.
70/30 and 80/20 Ratios
These are considered "high-VG" liquids. They are designed for sub-ohm vaping, where the coil resistance is below 1.0 ohm. The thicker liquid prevents the tank from leaking through the large airflow holes, and the high VG content allows for massive vapor production at higher wattages.
Hardware Compatibility and Safety
Using a high-VG liquid in a small pod system can lead to burnt coils because the liquid is too thick to wick. Conversely, using a thin 50/50 liquid in a large sub-ohm tank can lead to leaking, as the liquid flows too easily through the large wicking ports.
When using high-wattage box mods or devices with external batteries (like 18650s), it is vital to practice proper battery safety. Always inspect your battery wraps for tears or nicks. Never carry loose batteries in your pocket or bag; always use a plastic protective case. Ensure you are using the correct charging cable and avoid leaving charging batteries unattended. Matching your batteries in dual-battery devices—using the same brand, model, and age—is also a standard safety practice.
For compatible charging and storage accessories, browse the available vape accessories.
The Role of Nicotine
Nicotine is an optional component in e-liquid, though most adult vapers choose a strength that fits their preferences. In the vaping industry, nicotine is generally available in two different forms: Freebase and Nicotine Salts.
Freebase Nicotine
This was the standard for the industry for many years. Freebase nicotine is the "purest" form of nicotine and is highly alkaline. Because of its alkalinity, it becomes increasingly harsh on the throat as the concentration increases. This is why freebase liquids are typically sold in low strengths like 3mg, 6mg, or 12mg. It is the preferred choice for sub-ohm vapers who want to inhale large volumes of vapor without excessive throat irritation.
Nicotine Salts (Nic Salts)
Nicotine salts are created by adding an organic acid (usually benzoic acid) to freebase nicotine. This lowers the pH level, making the nicotine much smoother to inhale, even at very high concentrations. Nicotine salt e-liquids are typically found in strengths ranging from 25mg to 50mg.
Because of the high concentration, nicotine salts should never be used in sub-ohm or high-wattage devices. They are strictly intended for low-output pod systems. Using nic salts in a high-wattage setup can result in an unpleasantly high intake of nicotine.
Flavorings: Creating the Profile
The flavorings used in e-liquids are what make vaping so diverse. These are concentrated, food-grade flavor additives. While the exact recipes are often proprietary secrets of the manufacturers, the industry has standardized the types of flavorings used to ensure they are suitable for inhalation.
Quality and Purity
At Vapor Authority, we only stock e-liquids that use high-quality flavorings manufactured in the USA. We avoid products that contain harmful additives like vitamin E acetate. Furthermore, reputable US manufacturers test their liquids for diacetyl and acetyl propionyl, which are compounds that some vapers prefer to avoid.
Flavor Categories
The variety of flavors is nearly endless, but most fall into a few primary categories:
- Tobacco: Designed to mimic the earthy, smoky notes of traditional tobacco.
- Menthol and Ice: Provides a cooling sensation, often paired with fruit or mint.
- Fruit: Includes everything from single-note apples to complex tropical blends.
- Dessert: Rich profiles like custard, cheesecake, or cookies.
- Beverage: Flavors modeled after coffee, soda, or lemonade.
The Manufacturing Standard: Why US-Made Matters
Where your e-liquid is made is just as important as what is in it. The US vaping industry has developed some of the most sophisticated manufacturing standards in the world.
When a liquid is "US-made," it typically means it was produced in a laboratory environment that follows Good Manufacturing Practices (GMP). These labs use automated equipment to ensure that every bottle has the exact same ratio of ingredients and nicotine strength. This level of precision is difficult to find in "bathtub" blends or imported liquids from regions with less oversight.
We only purchase directly from the manufacturer or an authorized distributor. This guarantees that the product you receive is 100% authentic. In an industry where clones and counterfeits are common, our commitment to authenticity ensures that the ingredients on the label are actually what is inside the bottle.
You can learn more about Vapor Authority’s sourcing and fulfillment practices on the About Us page.
Storage and E-Liquid Longevity
Because e-liquid contains organic compounds and nicotine, it is subject to degradation over time. Proper storage is essential for maintaining the flavor and nicotine integrity of your juice.
Heat and Light
The two biggest enemies of e-liquid are heat and sunlight. UV rays can break down nicotine molecules through a process called oxidation. You may notice your e-liquid turning a darker amber or brown color over time; this is usually a sign of nicotine oxidation. While it doesn't necessarily mean the liquid is "spoiled," it can change the flavor and reduce the nicotine's potency.
Air Exposure
Oxidation also occurs when e-liquid is exposed to oxygen. Always keep your bottles tightly sealed when not in use. If you leave a cap off for an extended period, the flavor may "mute," and the nicotine may become harsher.
Safety First
Always store your e-liquid in a cool, dark place, such as a cupboard or a drawer. Most importantly, ensure that all e-liquids are stored out of the reach of children and pets. The high nicotine concentrations in some liquids, especially nicotine salts, can be dangerous if ingested. Most modern bottles use child-resistant caps, but these are "resistant," not "proof," so physical separation is the best policy.
Storage bottles and carrying cases are among the accessories available for e-liquid.
The Importance of Steeping
You may hear experienced vapers talk about "steeping" their e-liquid. Steeping is the process of letting the ingredients settle and bond over time. When e-liquid is freshly made, the flavors, PG, VG, and nicotine may not be fully homogenized.
By letting a bottle sit for a week or two in a dark place, the flavor profile often becomes deeper and more complex. Dessert and tobacco flavors, in particular, tend to benefit significantly from steeping. Most of the liquids we ship from San Diego have already had some time to age during transit, but if a flavor seems "thin" or overly chemical, a few days of steeping can often resolve the issue.
Summary of Ingredient Functions
To recap the "what is vape juice made of" question, here is how each component contributes to your experience:
- Propylene Glycol (PG): Provides the throat hit and carries the flavor. It is thin and helps with wicking in smaller devices.
- Vegetable Glycerin (VG): Creates the vapor clouds and adds smoothness. It is thick and requires more power to vaporize.
- Nicotine: Provides the nicotine satisfaction. Available in Freebase (low strength, higher throat hit) or Salts (high strength, very smooth).
- Flavorings: Provide the specific taste profile, from fruits to tobaccos.
By understanding these components, you can better select the products that fit your specific needs. If you find your current vape too harsh, you might look for a higher VG ratio. If you find the flavor lacking, a higher PG ratio or a different brand might be the answer.
We offer a wide selection of e-liquid flavors and ratios that can be shipped directly to your door, subject to state regulations. Every brand on our site is vetted by our team to ensure it meets our standards for quality and authenticity.
Conclusion
Understanding the ingredients in your e-liquid allows you to vape with confidence and precision. By balancing the ratios of PG and VG and choosing the correct nicotine type for your hardware, you can significantly improve your experience. Remember that quality matters—sticking to US-made, authentic liquids ensures you are getting exactly what is listed on the label.
- Always match your PG/VG ratio to your specific device type.
- Choose between freebase and nicotine salts based on your wattage and desired smoothness.
- Store your liquids in a cool, dark place to prevent oxidation and flavor loss.
- Prioritize US-made liquids from trusted retailers like Vapor Authority to ensure purity and authenticity.
Explore our extensive collection of premium, US-made e-liquids and find the perfect flavor and ratio for your setup.
FAQ
Is there oil in vape juice?
No, standard e-liquids do not contain oils. The "Vegetable Glycerin" used is a water-soluble alcohol derivative, not an oil. Inhaling actual oils can be extremely dangerous, which is why reputable e-liquid manufacturers only use PG, VG, and water-soluble flavorings.
Why did my vape juice change color?
E-liquid usually changes color due to the oxidation of nicotine. When nicotine is exposed to light or heat, it naturally turns a darker yellow or brown. This is a normal process and typically does not mean the liquid is unsafe to use, though the flavor may change slightly.
Can I mix different e-liquids together?
Yes, you can mix e-liquids if they use the same base ingredients (PG and VG). Many vapers mix flavors to create custom profiles or mix different nicotine strengths to achieve a specific level. However, avoid mixing nicotine salts with freebase nicotine unless you are certain your device can handle the resulting concentration.
What does "USP Grade" mean on a label?
USP stands for United States Pharmacopeia. When an ingredient like PG or VG is labeled as USP Grade, it means it has been certified to meet a specific level of purity and is safe for use in food or medicine. At Vapor Authority, we ensure the brands we carry utilize these high-standard ingredients.
