Glycerol serves as being a humectant, meaning it provides dampness to the answer. Glycerol is classed as "frequently recognized as Secure" by the FDA, so it's permitted for intake. A significant problem that plagues many vape pens is the issue of refillable tanks. Spills, leaks and damage all cause undesirable https://vapepodcenter.com/product/autumn-tobacco-18mg-juul2-pods/