Since Dr. Raphael Mechoulam first discovered THC in the early 1960’, eighty-five other cannabinoids have been identified in the cannabis plant. There are six primary cannabinoids found among different cannabis strains: THC, CBD, CBN, THCV, CBG and CBC. On fresh, undisturbed cannabis, these cannabinoids exist as acids. When heated, acidic THC is converted to its neutral form, and becomes psychoactive. THC, CBD and THCV cannabinoids are of significant medicinal interest, though all of the minor cannabinoids are being studied for potential medical applications. Each cannabis strain may contain one or several cannabinoids, and the ratios of cannabinoids varies widely amongst the different strains.