You must have heard of e-juice or tried the taste of vape juice if you are a rookie or a professional audiophile vaper. Vape juice is a thing with many different names, including E-juice and E-liquid. Are you wondering what e-juice made out of is? Is the composition of vaping oil harmful? What is PG and VG in vape juice? That is precisely the difference between VG and PG? Maybe now you are confused about these concepts or struggling with how to choose the best PG VG ratio that suits you. This article below will give you a reference answer. What is PG and VG?