E-liquid or e-juice is used in a vaporizer with e-cigarettes to produce vapor.
The base, or carrier, holds the nicotine and flavor in suspension so your e-cigarette or vaporizer can produce those nice clouds of smoke-like vapor.
Both propylene glycol and vegetable glycerin are non-toxic organic compounds and generally considered safe for consumption by the FDA. In fact, they are widely used as food additives in a variety of commercially available food and personal care products. Like ketchup? There’s propylene gylcol in it.
PG e-liquid tends to give you a better throat hit and a lot more flavor. Most premium e-liquid is 100% PG based. VG e-liquid on the other hand, allows your atomizer to produce a lot more vapor. VG e-liquid is a thicker and more sticky fluid, and although most people do not show signs of allergy with VG, there are minority groups who complain about having phlegm buildup in their throats. The more VG e-liquid you use, the less of a throat hit you’re going to get – that’s the general idea.
The vaping community is evenly divided when it comes to e-liquid preference. Some enjoy the intense throat hits more than flavor and vapor, others enjoy the sweet, thick plumes of vapor.
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.