WHAT LIQUIDS CAN YOU VAPE? DISCOVER THE TRUTH!

Key Takeaways

• Not All Vape Liquids Are Created Equal

  Only vape liquids specifically designed for e-cigarettes should be used. Vaping substances like essential oils, THC oils, or DIY mixtures can be extremely dangerous and damage your device and health.

• Choose the Right PG/VG Ratio for Your Device

  The balance of Propylene Glycol (PG) and Vegetable Glycerine (VG) affects flavour, throat hit, and vapour production. High-PG e-liquids are best for classic vape pens, while high-VG juices suit sub-ohm devices.

• Quality and Safety Matter

  Stick to reputable vape brands that meet UK regulations. Using certified e-liquids with clearly labelled nicotine strengths ensures a safer and more consistent vaping experience.

Can you use any liquid in any vape?

Using any liquid in any vape is not advisable and can lead to various issues. Refillable vape kits are designed to work with specific e-liquids, ensuring optimal performance and user satisfaction. Vape devices and e-liquids are designed with specific compatibilities in mind, and using the wrong liquid can damage your device or negatively impact your vaping experience. For instance, sub-ohm tanks require e-liquids with higher VG (vegetable glycerine) content for optimal performance, while pod systems are typically designed for higher PG (propylene glycol) e-liquids or nicotine salts. Additionally, using incompatible e-liquids can result in poor flavour, reduced vapour production, and even cause serious coughing and throat irritation. Therefore, it’s essential to match your e-liquid type to your specific vape device to ensure a safe and enjoyable vaping experience. Using other liquids that are water-based could lead to burning the throat and airways as water evaporates at a lower temperature than e-liquids and the high temperature put out by the coil is unlikely to be be able to lower to the point that this is safe.

What is vape juice?

Vape juice, also known as e-liquid or e-juice, is the liquid used in electronic cigarettes and vape devices to produce vapour. It typically comprises four main ingredients:

• propylene glycol (PG)
• vegetable glycerine (VG)
• flavourings
• nicotine

PG and VG serve as the base liquids; PG is known for having a thinner consistency and carrying flavour well while providing a throat hit similar to smoking, while VG has a thicker consistency and produces more vapour. Vegetable glycerine is a key ingredient that affects the texture and vapour production of the e-liquid. Flavourings in vape juice come in a wide range of varieties, from traditional tobacco and menthol to fruity and dessert-like flavours. Nicotine content varies, allowing users to choose their preferred strength or opt for nicotine-free options. This combination of ingredients creates the vapour that mimics the sensation of smoking, making vape juice a crucial component of the vaping experience.

Can you put any e-liquid in any vape?

No, you cannot put any e-liquid in any vape due to differences in device designs and vape liquids formulations. Vape devices are engineered to work with specific types of e-liquids for optimal performance and safety. For example, sub-ohm tanks are designed for e-liquids with higher VG (vegetable glycerine) content because VG produces larger clouds of vapour, while high-PG (propylene glycol) e-liquids are better suited for devices with smaller coils and higher resistance, such as pod systems and mouth-to-lung (MTL) devices. Using the wrong e-liquid can lead to poor vapour production, diminished flavour, and potential damage to the vape device. It may also pose health risks if the e-liquid composition is not suitable for the device’s operating temperature. Therefore, it is essential to use e-liquids that are specifically recommended for your vape device to ensure a safe and enjoyable vaping experience.

Does the type of nicotine affect the vape experience?

Yes, the type of nicotine used in e-liquids significantly affects the vape experience. There are primarily two types of nicotine found in e-liquids: freebase nicotine and nic salt vape juice. Freebase nicotine, the more traditional form, provides a stronger throat hit and is typically found in e-liquids with lower nicotine concentrations, making it suitable for sub-ohm vaping. On the other hand, nic salt e-liquids, which use the natural ‘salt’ state of nicotine in tobacco leaves, offer a smoother throat hit even at higher nicotine concentrations. This makes nicotine salts ideal for pod systems and devices with lower power output, allowing users to vape higher nicotine levels comfortably. The choice between these nicotine types impacts the intensity of the nicotine hit, the smoothness of the inhale, and overall satisfaction, enabling vapers to tailor their experience to their preferences and nicotine needs.

What type of nicotine e-liquid is used in disposable vapes?

Disposable vapes typically use nicotine salt e-liquids due to their smoothness and high nicotine content, which is well-suited for compact, low-power devices. Nicotine salts provide a quick and satisfying nicotine hit without the harshness associated with higher concentrations of freebase nicotine. This makes them ideal for users looking for convenience and a similar experience to smoking without the need for refilling or recharging. The use of nicotine salts in disposable vapes also enhances the device's efficiency in delivering nicotine, catering to those seeking a straightforward and portable vaping option.

Why do nic salt liquids taste so strong?

Nicotine salt liquids taste stronger primarily due to their chemical composition, the way nicotine is absorbed in the body, and the amount of flavourings used. Nicotine salts, or 'nic salt,' are a crystalline form of nicotine that naturally occurs in tobacco leaves. When used in e-liquids, nicotine salts allow manufacturers to increase the concentration of nicotine without making the vapour produce an harsher throat hit. The higher nicotine concentration that nic salt can provide means that vapers can achieve a satisfying nicotine hit even with smaller amounts of vapour. Additionally, the pH level of nic salts is closer to neutral compared to freebase nicotine, which is more alkaline. This difference in pH results in a smoother throat hit and enhances the perceived strength of the nicotine. As a result, nic salt liquids provide a more intense nicotine experience compared to traditional freebase nicotine e-liquids, making them particularly popular among vapers who prefer an intense nicotine hit but a smooth inhale.

Interestingly, nic salt e-liquids appear to use more flavourings than freebase nicotine e-liquids. One Dutch study found that nic salt e-liquids contain 3 to 4 times the amount of flavourings used in their freebase nicotine counterparts (1). This is significant because the flavourings produce some of the volatile compounds produced by the vaporisation process, so while E-Cigarettes are considered to be at least 95% less harmful than traditional cigarettes according to Public Health England (2), it may be that vaping with nic salt e-liquids is on the more harmful end of vaping.

Is it safe to vape nicotine-free e-liquids?

Vaping nicotine-free e-liquids is generally considered safe for most individuals, as these liquids do not contain nicotine, which is the addictive substance found in tobacco products. Nicotine-free e-liquids primarily consist of propylene glycol, vegetable glycerine and flavorings. These ingredients are commonly recognised as safe for inhalation by regulatory bodies when used appropriately in vaping products. Vaping nicotine-free e-liquids can still provide an enjoyable vaping experience with flavours ranging from fruits and desserts to menthol and tobacco alternatives. However, it's important to purchase e-liquids from reputable manufacturers to ensure the ingredients are high quality and safe for inhalation. Additionally, while nicotine-free vaping is generally safer than using nicotine-containing products, individuals with respiratory conditions or sensitivities to certain ingredients should exercise caution and consult with healthcare professionals if they have any concerns about vaping.

What type of e-liquid should I use for my sub-ohm vape kit?

For sub-ohm vaping, it's crucial to use e-liquids with a high VG content, typically around 70% VG or higher. Sub-ohm vape kits utilise coils with resistance lower than 1 ohm, which generates more heat and vapour production. VG is thicker and produces denser clouds of vapour, making it ideal for sub-ohm devices. Additionally, high VG e-liquids tend to have a smoother throat hit compared to those with higher PG (propylene glycol) content, which can be harsher at higher temperatures and with more vapour. Choose e-liquids specifically labeled as suitable for sub-ohm vaping to ensure compatibility and optimal performance. These e-liquids often come in a wide range of flavours and nicotine strengths, catering to various preferences while delivering a satisfying vaping experience with enhanced vapour production and smooth flavour delivery.

What are the best vape flavours?

The best vape juice flavours largely depend on personal preference, as taste is subjective, and may even change over your vaping journey. However, certain flavours tend to be popular among vapers.

Fruit flavours are often favoured for their refreshing and natural sweetness and often include

• Strawberry
• Blackcurrant
• Watermelon 
• Cherry
• Raspberry

Dessert flavours such as vanilla, caramel, and chocolate satisfy vapers looking for richer, indulgent tastes reminiscent of their favourite treats. Menthol and mint flavours provide a cooling sensation that appeals to those seeking a crisp and refreshing vape experience. Additionally, tobacco flavours cater to former smokers seeking a familiar taste and help make the transition to vaping as smooth as possible. Ultimately, the best vape flavours are those that align with individual taste preferences and provide an enjoyable vaping experience.

Does vape liquid expire?

Yes, vape liquid does have an expiration date. While vape juice typically has a shelf life of about one to two years if stored properly in a cool, dark place, its components can degrade over time. Factors such as exposure to direct sunlight, air, and heat can accelerate this degradation process. As vape liquid ages, its flavour may diminish, and the nicotine potency can decrease. Using expired vape liquid may result in a less enjoyable vaping experience due to muted flavours and reduced nicotine effectiveness. Moreover, expired vape liquid may also pose potential health risks as the breakdown of its ingredients could produce harmful compounds. Therefore, it's advisable to check the expiration date on vape liquid bottles and replace them if they are past their shelf life to ensure safety and optimal vaping quality.

Will vaping help me quit smoking?

Can I make my own vape juice?

Yes, it is possible to make your own vape juice, but it requires careful attention to safety and accuracy in mixing ingredients. To create vape juice, you'll need a base liquid, usually a combination of propylene glycol (PG) and vegetable glycerine (VG), which serve as carriers for flavourings and nicotine. Flavour concentrates are added to achieve desired taste profiles, and nicotine, if desired, must be handled with caution due to its potency. Mixing ratios of PG, VG, flavourings, and nicotine should be precise to ensure a consistent vaping experience and to avoid potential health risks associated with improper mixing. It's crucial to use ingredients specifically designed for vaping and adhere to safety guidelines to prevent contamination or accidental exposure to concentrated nicotine. Many vapers choose to make their own vape juice for customisation, cost savings, and to have full control over ingredients, but beginners should thoroughly research and follow reputable recipes and guidelines to ensure safety and quality.

How do you use shortfill e-liquids?

Shortfill e-liquids, popular in regions with nicotine concentration restrictions, come in larger bottles filled partially with nicotine-free vape juice. The remaining space is left for adding nicotine shots, which are small bottles containing concentrated nicotine in various strengths. To use a shortfill e-liquid, first ensure the bottle is shaken well to mix any flavour concentrate settled at the bottom. Then, simply remove the cap and add the appropriate number of nicotine shots to achieve your desired nicotine strength, typically measured in milligrams per milliliter (mg/mL). After adding the nicotine shots, replace the cap and shake the bottle thoroughly to evenly distribute the nicotine throughout the e-liquid. Allow the mixture to steep for a short period to blend flavours before use. Shortfill e-liquids offer vapers flexibility in choosing nicotine strength while maintaining the ability to enjoy larger bottle sizes and diverse flavour options.

What strength vape juice should I choose?

The strength of vape juice you should choose depends on several factors, primarily your nicotine dependence and vaping habits. Nicotine strengths typically range from 0mg/mL (nicotine-free) to 50mg/mL or higher for nicotine salts, with a maximum strength available of 2.0% or 20mg/ml for retail e-liquids here in the UK, with intermediate levels such as 3mg/mL, 6mg/mL, 12mg/mL, and 18mg/mL being common for freebase nicotine. If you are a heavy smoker or have a high nicotine dependence, higher nicotine strengths may initially be more suitable to satisfy cravings. Conversely, if you are a light smoker or aiming to reduce nicotine intake, lower strengths or nicotine-free options might be preferable. It's essential to match the nicotine strength to your vaping device as well; pod systems and higher resistance coils often work best with higher nicotine strengths or nicotine salts, while sub-ohm devices are typically used with lower nicotine concentrations due to the higher vapour production. Experimenting with different strengths and adjusting based on your vaping experience and satisfaction level can help determine the optimal nicotine strength for your needs.

Are UK made e-liquids the best?

The quality of UK-made e-liquids is often highly regarded due to stringent regulatory standards and quality control measures enforced by organisations like the Medicines and Healthcare products Regulatory Agency (MHRA) and the Tobacco and Related Products Regulations (TRPR) (4). These regulations ensure that e-liquids manufactured in the UK undergo rigorous testing for safety, consistency, and purity of ingredients. Additionally, UK manufacturers adhere to strict production practices, including proper labeling and packaging requirements, which provide vapers with transparency and confidence in the products they use. While preferences for e-liquid flavours and strengths vary individually, the reputation of UK-made e-liquids for adhering to high standards and regulations contributes to their perceived quality and reliability among consumers both in the UK and internationally.

What about SMOKO E-liquids?

Our premium vape juices are made in the UK and regulated by the Medicines and Healthcare products Regulatory Agency (MHRA) to abide by the high standard of regulation set out by the Tobacco and Related Products Regulations (TRPR) and Tobacco Products Directive (TPD). That means across our range of vape juices and prefilled vape refills you can rest assured you are experiencing the best the vaping industry has to offer!

With a huge range of popular flavours for seasoned smokers including our Original Tobacco, Virginia Rolling Tobacco, Havana Cigar, Gold Tobacco and Menthol Tobacco flavours, or for those vapers who prefer something more delectable for their taste buds like Vanilla, and even fruity notes in our Strawberry, Raspberry and Fruit Burst flavours, SMOKO's huge selection of e-liquid flavours has something for every palate!

Can you use any liquid in any vape? Discover the truth - Conclusion

If you are looking to quit smoking then it is great to know that a recent Cochrane study found 'high certainty' evidence that E-Cigarettes are more effective for quitting smoking than traditional forms of nicotine replacement therapy (5). However, this is based on e-liquid containing nicotine to tackle the cravings to help tackle the desire to smoke. While various forums may indicate vaping other liquids or even adding water to your e-liquid to thin it out is possible, unless the device is designed for it you may find all you get for your troubles is a burnt throat and a malfunctioning device.

While the great-tasting SMOKO liquids are available in 10ml bottles, we believe in providing an easy, hassle-free vaping experience while being environmentally conscious. The SMOKO E-Cigarette and the SMOKO VAPE POD starter kits use prefilled refills containing your favourite SMOKO flavour, eliminating the need for messy filling and device maintenance - just pop your refill on the battery and you are good to go! You can even recycle your empty refills with us for free!

Make the switch with SMOKO today!

FAQ: What Liquids Can You Vape?

1. Can I vape any liquid I find?

No. You should only vape liquids specifically formulated for e-cigarettes. Substances like essential oils, alcohol, or homemade infusions can be harmful and are not safe to inhale.

2. What are the main ingredients in vape liquids?

Most vape liquids contain Propylene Glycol (PG), Vegetable Glycerine (VG), flavourings, and optionally nicotine. The ratio of PG to VG affects throat hit and vapour production.

3. Can I use CBD or THC oils in a vape?

Not in standard vape devices. CBD and THC oils require special vaporizers designed for thick oils. Using them in regular e-cigarettes can ruin your device and pose health risks.

4. Is it safe to make my own vape liquid at home?

DIY vape liquids are not recommended unless you have proper training and access to pharmaceutical-grade ingredients. Mistakes in mixing or dosing can be dangerous.

5. How do I know which e-liquid is right for my vape?

Check your device’s specifications. High-PG liquids work best in low-power vape pens, while high-VG liquids are suited to sub-ohm or high-wattage kits. Always read manufacturer guidance.

Most vape liquids contain Propylene Glycol (PG), Vegetable Glycerine (VG), flavourings, and optionally nicotine. The ratio of PG to VG affects throat hit and vapour production.

3. Can I use CBD or THC oils in a vape?

Not in standard vape devices. CBD and THC oils require special vaporisers designed for thick oils. Using them in regular e-cigarettes can ruin your device and pose health risks. Please note that the instances of E-Cigarette and Vaping Associated Lung Injury (EVALI) in the United States are linked to vitamin E acetate - a chemical used to mix THC into e-liquid.

4. Is it safe to make my own vape liquid at home?

DIY vape liquids are not recommended unless you have proper training and access to pharmaceutical-grade ingredients. Mistakes in mixing or dosing can be dangerous.

5. How do I know which e-liquid is right for my vape?

Check your device’s specifications. High-PG liquids work best in low-power vape pens, while high-VG liquids are suited to sub-ohm or high-wattage kits. Always read manufacturer guidance.

REFERENCES

(1) Comprehensive Dutch market data analysis shows that e-liquids with nicotine salts have both higher nicotine and flavour concentrations than those with free-base nicotine 

(2) Nicotine vaping in England: 2022 evidence update

(3) Four in ten smokers wrongly believe that vaping is as or more harmful as smoking

(4) E-cigarettes: regulations for consumer products

(5) Latest Cochrane Review finds high certainty evidence that nicotine e-cigarettes are more effective than traditional nicotine-replacement therapy (NRT) in helping people quit smoking

ABOUT THE AUTHOR

Written by Dan Overgage

Dan Overgage – is a former smoker of 10 years until he became a client of SMOKO E-Cigarettes.  Dan started working with SMOKO 5 years ago after successfully quitting using our e-cigarettes and works across our Customer Service and heads up our content creation and research with a strong focus on all things quitting smoking.  During his tenure with SMOKO, Dan has written countless blogs and consults with countless clients every day to help them to stay smoke free.

Last updated 07/08/2025