Thinning brokers – Most THC oil cartridges incorporate some form of thinning agent. This is necessary to the oil to keep up a consistency that is optimal for vaping. The most typical thinning agents are vegetable glycerin and propylene glycol (VG and PG), which are commonly present in regular e-liquid. https://riverzinml.develop-blog.com/32556466/manual-article-review-is-required-for-this-article