Mono Propylene Glycol is one of the primary ingredients in the majority of e-liquids and e-cigarette cartridges today. Most e-liquid contains at least 40% propylene glycol. This is the ingredient that produces the smoke like vapour when the e-liquid is vaporised.
Propylene Glycol is much thinner than its counterpart vegetable glycerin (VG), meaning it produces much more of a ‘throat hit’ than a VG based e-liquid does. Some believe this helps to stimulate the feel of smoking more.
Due to severe shortages in supply, prices of Vegetable Glycerine and Mono Propylene Glycol have increased significantly, we are hoping that this will be a short term event.