The Science Behind Vape Juices: Understanding PG, VG, and Flavorings

Vape Juice

E-liquids, also known as vape juices, have long been a staple in the world of vaping. They serve as the fuel for your vape device, enabling it to function and produce vapor. However, for newcomers to vaping, e-liquids can initially seem perplexing. It’s essential to grasp the basics of e-liquids to fully enjoy and explore the world of vaping.

In today’s discussion, we will delve into the two primary ingredients found in vape juices: propylene glycol (PG) and vegetable glycerin (VG). By understanding the difference between PG and VG, you’ll gain insights into their effects on your vaping experience. Additionally, we’ll explore the role of flavorings that are infused into these ingredients. Let’s dive in!

PG and VG – What Are They?

PG and VG are the primary ingredients in vape juice. You’ll find them mentioned on every e-liquid bottle, along with the ratio rate of these two ingredients. They serve as the diluents and carriers of the vape juice.

VG and PG play a vital role in creating vape clouds that simulate the experience of smoking. When the coil inside the vape device is heated, it produces an aerosol consisting of PG and VG, along with nicotine and flavorings. When users inhale the vape juice, they experience a satisfying, flavored taste.

What Does PG mean?

PG, or propylene glycol, is a synthetic liquid that is slightly thicker than water. Vape juice companies utilize PG in e-liquids on an industrial scale, employing propylene oxide and water to produce high-purity PG, commonly referred to as pharmaceutical grade. One notable characteristic of PG is that it is colorless, tasteless, and odorless. Chemically, it belongs to the Diols family.

PG serves two key functions within e-liquid. Firstly, it acts as the carrier for both the flavorings and nicotine, ensuring they are evenly distributed throughout the liquid. This allows for a consistent and enjoyable vaping experience, where the flavors are pronounced, and the desired level of nicotine is delivered.

Secondly, PG is responsible for the throat hit that vapers experience during inhalation. A higher ratio of PG in an e-liquid will provide a stronger throat-hit sensation, which can be appealing to those who want to simulate the feeling of smoking traditional cigarettes. The throat hit adds to the overall satisfaction of the vaping experience for many users.

What Does VG mean?

VG shares similarities in chemical structure with PG but contains more OH groups in its molecule. It is a sugary element with a high boiling point of approximately 290 degrees Celsius and exhibits a syrup-like consistency. VG is characterized by its lack of color and odor, but it is a thick liquid with a naturally sweet taste.

VG is commonly obtained as a by-product during various industrial processes involving natural oils. It is derived from oils such as rapeseed, soybean, and coconut, which contribute to its composition and properties.

VG contributes to a smoother and less harsh inhaling experience. Its thicker consistency helps to create a smoother sensation when inhaling the vapor, resulting in a more pleasurable vaping experience. Moreover, people who prefer dense vape clouds often opt for an e-liquid with a higher VG ratio.


If you want a maxed-out flavor from your e-liquid, then the e-liquid needs to have a balanced PG & VG ratio. Always look out for the 50:50 ratio for maximum flavor with denser vapor production.

Final Thoughts

We certainly hope that you now have a good understanding of the science behind vape juice, including the significance of VG, PG, and flavorings. These ingredients work together harmoniously to create an exceptional vaping experience. Each component plays a crucial role in delivering the desired flavor, vapor production, throat hit, and overall satisfaction. Visit Vapes Direct to explore a wide range of vape juices including high PG vape juice.

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