and was found by Swiss chemists who were studying the chemistry of the plant. First, let's take a brief look at the history of THC Vape Pen and CBD. It wasn't until the late 1990s that its anti-inflammatory qualities and use as a remedy for health issues gained more traction. The first isolation of CBD occurred in 1940. To get the most out of CBD or THC oils, you must learn how to vape them....