Using healthcare marijuana dates to historic civilizations, while historians are undecided about whether the to start with clinical use of cannabis was in China, exactly where the plant is indigenous. [1] Cannabinoids like delta-9 THC have a sequence of carbon atoms; D9 has a double bond over the ninth atom. https://manuelnvybe.shotblogs.com/5-easy-facts-about-cannabis-edibles-described-46864455