Thinning agents – Most THC oil cartridges have some sort of thinning agent. This is needed for that oil to keep up a consistency that is optimal for vaping. The most common thinning agents are vegetable glycerin and propylene glycol (VG and PG), which are commonly located in standard e-liquid. https://delta-8-thc-carts51482.aboutyoublog.com/27097142/the-basic-principles-of-delta-8-thc-carts-for-sale