1: What is E-liquid / E-juice ?


The eliquid – also named as ejuice is the liquid used in electronic cigarette for producing vapor and simulating smoking. It’s normally composed of up to 4 ingredients:

  • PG (Propylene glycol)
  • VG (Vegetable Glycerin)
  • Flavor (Hundreds kind of food flavors)
  • Nicotine (You can choose 0 nicotine)

Also you can add some distilled water to dilute the E-Liquid if it’s too thick, such as 100% VG based eliquid.

2: PG vs VG


The PG (Propylene glycol) and VG (Vegetable Glycerin) are the two primary base ingredients of eliquid. They are all FDA approved and are equally safe.

  • The PG is a clear, colorless liquid which usually been used as a flavoring carrier in food products, The main applications of Vegetable Glycerin are cosmetics products, food production, and e-juice.
  • The VG is a natural organic liquid made from vegetable oil, it’s sweet and thick, more viscous than PG. The main applications of Vegetable Glycerin are cosmetics products, food production, and e-juice.
  • The PG is thinner and the VG is thicker.

E-liquid can be made up of 100% PG base, 100% VG base or a combination of both.But which one is better? We will talking about this in different categories:

Throat Hit: PG based eliquid provides a stronger throat hit and more pure flavor taste than the VG based ones.

Vapor Production: VG based leiquid creates more vapor than the PG based ones, and it has a slightly sweet aftertaste.

Storage Time: The PG based eliquid has longer storage time than the VG based ones cos its powerful moisturizing properties.

Temperature Resistance: VG based eliquid has higher temperature resistance than the PG based one.

So: Higher Power needed to produce vapor with VG based eliquid. But it may cause burnt tastes using high power with PG based eliquid.

Atomizer Friendliness:

  • PG is thinner and has low density, it’s absorbed much faster by wick materials, and less likely to gunk up your wicks and heating elements of the atomizers, meaning less cleaning required for the atomizers/ That will meet many popular atomizers/ clearomizers in the market, such as CE4, vivi nova and protank.
  • VG is thicker and has high density, it can produce thicker clouds, but it’s also more likely to build up on your wicks, heating elements and other vaping components, meaning more cleaning and maintenance will be required. So it’s best to use with the rebuildable atomizers, such as Trident, Omega, etc.

P.S. A tiny percentage of people have an allergy to PG, such as rash or upset stomach.

Now most eliquid companies mix both PG and VG together to retain the advantages of the 2 ingredients. PG deliver you better flavor taste, stronger throat hit, and VG produce more vapors. The typical ratio of the PG and VG is 50/50, 60/40 and 70/30.

3: About the Nicotine


We don’t suggest those non-smokers / new vapers use nicotine in the eliquid cos it’s addictive.

The nicotine level is measured by the number of milligrams of nicotine per milliliter of liquid. So 24mg/ml means there is 24 milligrams of nicotine in 1 milliliter of liquid. For those smokers who wanna switch to vaping, you can choose the different nicotine levels depending on how many traditional cigarettes you consume daily. Just test and choose the best level for you.

Here is a list of Approximate Nicotine Levels used by many eliquid companies:

  • 0mg = None
  • 1mg to 11mg = Low
  • 12mg to 16mg = Medium
  • 17mg – 24mg = High
  • 25mg or more = Extra High

Don’t forget that you switch to ecig cos you want to quit, so don’t choose too high level, and also downgrade the nicotine level step by step to help you quit.

4: About the Flavor


The flavor concentrate is another important ingredient of eliquid which will provide you the taste you want. You can buy them online or you can develop your own flavors.

There are about 5% to 20% flavors added in most eliquid. EXCEPTION some Tobacco Flavors you only need 1% to 3%. Let me explain this:

if 10ml of eliquid = 100%, then there are:
95%-80% of PG or VG or PG/VG Mixture
5% – 20% flavor concentrate
and some nicotine.

So if you want to mix your own eliquid, such as: 10ml, 18mg, 50%PG / 50%VG, 10% Apple Flavor, you need to prepare:

1): 1ml of apple flavor
2): 4.5ml PG, 4.5ml VG
3): 180mg nicotine

Put them together in a bottle and shake for 15 seconds, and your eliquid is ready for testing.

5: Which Eliquid is Best for you?


There is no one can tell you which eliquid is exactly the best for you. the only way is to test by yourself. The 50/50, 60/40 or 70/30 mixtures is a good choice to start If you don’t know how to choose.

If you want more pure flavor tasting, just add some PG; if you want more vapor, just add some VG. Give it some time and you will find out the best proportions for you.

In my opinion, the 70%PG / 30%VG working great with most of the clearomizers in the market, and the 20%PG/80%VG is great for those RBAs.

PLUS: 6: PH Level of Eliquids


Just like other liquid, you should choose a good balance of PH level to get the best tastes when you buy or mix your own eliquid. Use a pH test strip to test it before you vape it.

It is advised that e-liquid pH levels should be between 6-8 for the ultimate taste.

In most cases, the PH level of eliquid will be on the side of alkaline. Because the ingredients of the eliquid, such as PG / VG are all alkalescent, even the flavor concentrate. So you can use some acidic juice or flavor concentrate, such as Lemon juice or Orange juice to counteract it.

Don’t forget to test the PH level after you added those acidic juice into your eliquid. Enjoy vaping and vaping healthily.