First, let’s talk about PG-based e-liquid, because it’s the most popular of the two.
Thinner Consistency: Due to the fact that propylene glycol has a runny consistency, PG e-liquid is thinner than the VG variety, and is easily absorbed by the polypill and cotton fabric inside cartomizers and wick tanks.
Less Gunk: The low density of the juice also means that gunk doesn’t build up on the heating element of your vaporizer as fast as it does when thicker vegetable glycerin liquid is used.
Does not affect flavor: Propylene glycol is a tasteless odorless substance, so it doesn’t alter the flavor of the e-liquid in any way.
Stronger throat hit: It’s also a powerful humectant, so while it will dry your mouth and throat if used consistently, PG also produces a stronger throat hit, similar to that of tobacco cigarettes.
Allergy Risk: On the down side, propylene glycol has been known to cause allergic reactions in some e-cig users. These can vary from minor reactions, like a tingling sensation in the throat, to serious irritations on various parts of the body. If you experience any unusual symptoms after vaping PG e-liquid, it’s best to stop using it immediately and switch to vegetable glycerin. Consult your doctor if necessary.
Vg is the other common ingredient for e-liquid
Thicker: Vegetable glycerin is a considerably thicker solution, compared to propylene glycol. It has a slower absorption rate for wicks and cartomizers.
More gunk: Because of it’s thick consistency, VG tends to gunk up and clog vaporizers, requiring more cleaning.
Sweeter: On its own, VG has a slight sweet taste which also makes the e-liquid sweeter and the flavors a little difficult to detect.
Allergy Risk: While PG is know to give users a dry mouth, some vapers have complained about phlegm building up in their throat after using vegetable glycerin-based juices. Some vapers switch to VG due to allergies with PG. VG tends to be less allergenic.
Less throat hit: You also get less of a throat hit when using VG.
More vapor: On the upside, because of its thick consistency, VG e-liquids produce significantly more vapor and doesn’t cause allergic reactions or irritations as often as propylene glycol.
Can you mix Vg with Pg
60 / 40 mix of VG and PG in your e-liquid can produce great vapor and more flavor. If you like, you can tend to use mix of both PG and VG in particular ratios, such as 70 VG / 30 PG. This is the optimum ratio for most each uses as it provides a nice throw hit, good flavor as well as tons of vapor production.
Vegetable Glycerin (VG) : more vapor, less throat hit.
VG e-liquid is thick and a little sweet. It produces luscious clouds of vapor. VG e-liquid also imparts a sweeter taste to your liquid. (VG e-liquid is available in Tobacco and Menthol flavors).
Propylene Glycol (PG): better throat hit and flavor.
PG e-liquid is thinner and produces more of a “throat hit” than VG e-liquid does, which simulates the feel of smoking better. PG e-liquid also has a higher rate of sensitivity for some people, meaning that some people just can’t use PG in their vape. Usually side effects are mild allergy symptoms.