VG and PG in E-Liquid

An e-liquid, also called vape juice, is the fluid used in vape devices to generate vapour. E-liquids primarily consist of vegetable glycerin (VG) and propylene glycol (PG), making up about 95% of the composition. The remaining 5% includes nicotine, flavourings, and other additives. Some e-liquids contain only VG without nicotine or flavourings. Various natural, artificial, and organic flavourings contribute to the taste of vape juice.

VG and PG cater to different vaping styles and preferences. High VG e-liquids are perfect for cloud chasers and sub-ohm vapers, providing a smoother draw and thicker vapour. High PG e-liquids enhance flavour intensity and throat hit, making them the preferred choice for MTL vapers and nicotine salt users. Striking the right VG/PG balance affects every aspect of vaping, from flavour concentration to vapour production.

What is VG and PG?

VG and PG are the two main components of e-liquids, shaping the overall vaping experience. VG comes from vegetable oils, making it a natural compound. Thick consistency, mild sweetness, and dense vapour production define its characteristics. High VG e-liquids require longer wicking times due to their viscosity. Coils tend to clog faster, necessitating frequent maintenance for VG-heavy setups.

PG differs significantly from VG. Propylene glycol (PG) is synthetic, odourless, and flavourless. Various industries, including food, cosmetics, and pharmaceuticals, use PG as an additive. Thin consistency and fast absorption make PG-based e-liquids ideal for MTL vaping and nicotine salt use.

The viscosity contrast between VG and PG affects throat hit, vapour production, and coil longevity. High VG e-liquids produce dense clouds and ensure a silky-smooth inhale, making them popular among DTL vapers and sub-ohm enthusiasts. High PG e-liquids enhance flavour intensity while delivering a strong throat hit, closely mimicking traditional cigarette smoking. Pod systems and high-resistance coils work best with PG-based e-liquids.

VG's mild sweetness can sometimes mute flavours, whereas PG's sharpness enhances taste clarity. Choosing the right VG/PG ratio ensures optimal performance based on personal preference and vaping style.

VG vs PG: Which is Better?

VG and PG offer distinct advantages and drawbacks. Choosing between the two depends on individual needs and vaping style. For cloud production and smooth inhales, VG works best. For a stronger throat hit and intensified flavour, PG becomes the superior choice.

VG and PG ratios affect vapour output, throat hit, and overall vaping satisfaction. Understanding the pros and cons of each helps in making an informed choice.

Pros and Cons of VG and PG

Both VG and PG have unique advantages and drawbacks. VG is ideal for cloud chasers, whereas PG caters to flavour-focused vapers and those who prefer a strong throat hit.

Pros and Cons of VG

Pros:

• Thick vapour production makes it ideal for cloud chasers.

• Smooth inhale with minimal throat irritation.

• Natural sweetness enhances dessert and fruity flavours.

Cons:

• High viscosity leads to faster coil buildup and clogging.

• Longer wicking time, especially in low-wattage devices.

• Slight flavour muting due to VG’s natural sweetness.

Pros and Cons of PG

Pros:

• Strong throat hit, closely mimicking traditional cigarette smoking.

• Superior flavour-carrying properties, enhancing taste clarity.

• Thin consistency ensures fast absorption and efficient wicking.

Cons:

• Minimal vapour production, making it less suitable for cloud chasers.

• Harsh throat hit at higher concentrations.

• Slight drying effect, potentially leading to mouth and throat irritation.

VG vs PG: Key Differences

Ideal PG/VG Ratio Based on Vaping Style

Different VG/PG ratios suit various vaping styles and devices. MTL (Mouth-to-Lung) vaping mimics traditional smoking, requiring higher PG content for a stronger throat hit and enhanced flavour. DTL (Direct-to-Lung) vaping, commonly used with sub-ohm devices, benefits from high VG content for massive cloud production and smoother inhales.

Best VG/PG Ratios for Different Vaping Styles

Selecting the right VG/PG ratio ensures optimal vaping satisfaction based on cloud production, throat hit, and flavour intensity.

What is the Best PG/VG Ratio for Different Vaping Styles?

The best PG/VG ratio depends on the vaping style. Mouth-to-lung (MTL) vapers need higher PG for a strong throat hit and flavour clarity, while direct-to-lung (DTL) vapers prefer higher VG for smoothness and dense vapour clouds. Choosing the right PG/VG ratio ensures optimal performance based on the vaping device and personal preferences.

Best PG/VG Ratios for MTL and DTL Vaping

Which PG/VG Ratio Is Best for MTL Vaping?

Mouth-to-lung (MTL) vapers should choose a PG-dominant e-liquid.

• PG enhances flavour intensity and provides a strong throat hit, mimicking traditional cigarettes.

• A 50/50 or 60/40 PG/VG ratio balances flavour sharpness and vapour production.

• Nicotine salts work best in MTL devices with a 50/50 PG/VG blend for smoother nicotine absorption.

Which PG/VG Ratio Is Best for DTL Vaping?

Direct-to-lung (DTL) vapers need a VG-dominant e-liquid for smoother inhales and thick clouds.

• VG produces dense vapour, making it ideal for sub-ohm vaping and cloud chasing.

• A 70/30 or 80/20 VG/PG ratio ensures a silky-smooth draw with mild throat irritation.

• High-VG e-liquids work best with low-nicotine strengths for an enjoyable, airy vape.

Choosing the Best PG/VG Ratio Based on Device Compatibility

The best PG/VG ratio depends on how you vape. MTL users need higher PG for sharp flavour and a strong throat hit, while DTL users benefit from higher VG for smoothness and big clouds. Choosing the right balance enhances overall vaping satisfaction.

How to Choose the Right PG/VG Ratio?

The ideal VG/PG ratio depends on personal preferences and device compatibility. Several factors influence vaping performance, including:

1. Throat Hit

High PG e-liquids deliver a stronger throat hit (50PG/50VG or 60PG/40VG). High VG e-liquids provide a smoother inhale (70VG/30PG or higher).

2. Vapour Production

Cloud chasers and sub-ohm vapers prefer high VG e-liquids (70VG/30PG or above). High PG e-liquids (50/50 or 60/40) generate less vapour, making them discreet and ideal for MTL vaping.

3. Flavour Intensity

PG-based e-liquids excel at flavour delivery, making them suitable for flavour-first vapers. VG-based e-liquids slightly mute flavours but enhance sweetness.

4. Device Compatibility

• Pod Systems & Vape Pens → Best suited for 50/50 or 60/40 PG/VG e-liquids.

• Sub-Ohm Tanks & High-Wattage Mods → Work best with 70/30 or higher VG blends.

• RDAs & Advanced Setups → Require 80/20 or 100% VG for maximum cloud production.

What are the Health Effects of VG and PG?

Both VG and PG are classified as Generally Recognized As Safe (GRAS) by the FDA for use in food, cosmetics, and pharmaceuticals. However, inhalation through vaping presents different considerations compared to ingestion. While most vapers tolerate VG and PG well, some may experience mild side effects, especially with high PG concentrations.

Health Effects of Propylene Glycol (PG)

Propylene Glycol (PG) is a synthetic compound widely used in medications, food preservatives, and cosmetics. Its low viscosity and high absorbency contribute to a strong throat hit and rapid wicking in vaping devices. However, PG can cause mild irritation in some users.

Possible Side Effects of PG:

• Throat Irritation: PG provides a sharp throat hit, which can be harsh for new vapers or those with throat sensitivity.

• Dry Mouth and Dehydration: PG has hygroscopic properties, meaning it absorbs moisture from the throat and mouth, leading to dryness or mild discomfort.

• Allergic Reactions: Some individuals experience minor allergic symptoms like itchiness, sore throat, or mild rashes when exposed to high-PG e-liquids.

• Respiratory Sensitivity: Rarely, PG inhalation may cause coughing or slight breathing discomfort, particularly in those with pre-existing lung conditions.

Proper hydration can help alleviate mild dryness caused by PG. Vapers with PG sensitivity often prefer higher VG e-liquids for a smoother experience.

Health Effects of Vegetable Glycerin (VG)

Vegetable Glycerin (VG) is a natural compound derived from vegetable oils. Its thick consistency and mild sweetness make it ideal for cloud production and smooth inhales. VG is generally well-tolerated, but its higher viscosity can impact vaping performance and respiratory comfort.

Possible Side Effects of VG:

• Increased Phlegm Production: VG’s thicker nature can lead to a buildup of mucus, causing some users to experience a mild cough or congestion.

• Dehydration & Dry Mouth: Similar to PG, VG absorbs moisture, potentially causing dry mouth or mild dehydration with frequent use.

• Slower Absorption in Wicking Materials: VG clogs coils faster, which may result in burnt hits or inconsistent vapour delivery if not properly maintained.

• Less Throat Hit: VG does not provide the strong throat hit that some users prefer, especially those transitioning from smoking.

Drinking water regularly and using compatible devices help prevent dryness and wicking issues when using high VG e-liquids.

Long-Term Considerations of VG and PG Inhalation

• No long-term studies have conclusively determined the effects of VG and PG inhalation over extended periods.

• VG and PG do not produce toxic byproducts like tar or carbon monoxide, which are present in traditional cigarettes.

• Individuals with respiratory conditions, such as asthma, should exercise caution, as vaping can cause mild lung irritation in sensitive users.

Both VG and PG are considered safe for consumption, but their effects when inhaled remain under continued research. Staying hydrated, monitoring individual tolerance, and selecting the right VG/PG ratio can help ensure a comfortable vaping experience.