Vegetable glycerin (VG)
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Vegetable Glycerin (VG): What It Is & How It Works in E-Liquid Mixing

Vegetable Glycerin (VG) is a key base ingredient used in e-liquid formulation and DIY vape mixing. It is a thick, slightly sweet, plant-derived liquid that plays an important role in vapour production and overall e-liquid consistency.

This guide explains what VG is, how it functions in vape liquid mixing, its main properties, and how it compares to Propylene Glycol (PG) in DIY formulations.

What Is Vegetable Glycerin (VG)?

Vegetable Glycerin is a natural compound derived from plant oils such as palm, coconut, or soy. It is commonly used in food, cosmetic, and pharmaceutical products, as well as vape liquid formulations.

In e-liquid mixing, VG is primarily used for:

  • Creating vapour production
  • Providing a smooth inhale experience
  • Adjusting liquid thickness
  • Balancing VG/PG ratios in DIY recipes

VG is one of the two core base ingredients used in almost all vape liquids, alongside Propylene Glycol (PG).

How Vegetable Glycerin Works in E-Liquid

VG functions as the primary vapour-producing component in e-liquid blends. When heated in a vape device, VG turns into a dense vapour.

Basic process:

  1. VG is combined with PG and flavour concentrates
  2. The mixture is blended evenly
  3. The liquid is absorbed into the coil wick
  4. The device heats the coil
  5. VG vaporizes into a thick vapour cloud

VG plays a major role in determining vapour density and smoothness.

Key Properties of Vegetable Glycerin (VG)

VG has several characteristics that make it essential in vape formulations.

1. Thick Consistency

VG is significantly thicker than PG.

Result:

  • Slower absorption into wicks
  • Requires compatible coil systems
  • Common in sub-ohm vaping setups

2. High Vapour Production

VG is the primary ingredient responsible for vapour clouds.

Result:

  • Dense vapour output
  • Cloud-focused performance
  • Smooth vapour texture

3. Smooth Inhalation

VG contributes to a softer throat feel compared to PG.

Result:

  • Less throat irritation
  • Milder inhale experience
  • Suitable for smoother blends

4. Slight Natural Sweetness

VG has a mild sweet taste that can influence flavour perception.

Result:

  • Slight enhancement of sweet flavour profiles
  • Can soften sharp flavour notes

VG vs PG in E-Liquid Mixing

VG and PG are used together in different ratios depending on the desired vaping experience.

Vegetable Glycerin (VG):

  • Thick consistency
  • High vapour production
  • Smooth inhale
  • Mild sweetness

Propylene Glycol (PG):

  • Thin consistency
  • Strong flavour carrier
  • Higher throat hit
  • Lower vapour production

Common VG/PG Ratios

VG and PG ratios affect both device compatibility and vaping style.

High VG (e.g., 70/30 VG/PG):

  • Large vapour clouds
  • Smooth inhale
  • Used in sub-ohm devices

Balanced (50/50 VG/PG):

  • Even flavour and vapour
  • Suitable for pod systems and MTL devices

High PG (low VG content):

  • Strong flavour focus
  • Thinner liquid consistency
  • Less vapour production

Device Compatibility

VG-heavy e-liquids are best suited for:

  • Sub-ohm vape kits
  • High-wattage devices
  • Mesh coil systems
  • Direct-to-lung (DTL) vaping setups

Because VG is thick, it requires devices capable of efficient wicking and heating.

Mixing & E-Liquid Formulation Use

In DIY mixing, VG is typically used as the base for:

  • Cloud-focused e-liquids
  • High VG blends
  • Nicotine-containing or nicotine-free formulations
  • Flavour-balanced recipes (in combination with PG)

It serves as the structural foundation of many e-liquid formulations.

Storage & Handling

Proper storage helps maintain VG quality:

  • Store in a cool, dry environment
  • Keep container tightly sealed
  • Avoid direct sunlight or heat
  • Store away from contaminants
  • Ensure cleanliness when pouring or measuring

Safety & Usage Considerations

When working with Vegetable Glycerin:

  • Use clean tools and containers
  • Avoid contamination during mixing
  • Store out of reach of children and pets
  • Do not use contaminated or expired materials
  • Follow standard DIY mixing safety practices

Considerations Before Using VG in DIY Mixing

When working with VG in e-liquid formulation, users typically consider:

  • Desired vapour production level
  • VG/PG ratio balance
  • Device compatibility (coil type and wattage)
  • Flavour intensity preferences
  • Throat hit vs smoothness preference
  • Mixing experience level

Final Thoughts on Vegetable Glycerin (VG)

Vegetable Glycerin is a core component of e-liquid formulation and DIY vape mixing, responsible primarily for vapour production and smooth inhalation. Its thick consistency and mild sweetness make it an essential base ingredient in a wide range of vape liquid recipes.

Understanding how VG works, how it compares to PG, and how it influences vapour production helps create more balanced and controlled e-liquid formulations.