The cartridges that tested highest for THC content were Pure Cure (71%) and Absolute Xtracts (70%). Some marijuana oil cartridges from the line created by Absolute Xtracts are even strain specific. None of the other oil cartridge brands tested in this sample named which strain of cannabis was used to make the oil. Just as the THC content in each cannabis oil cartridge is different, so are the mixing agnents used. Some are cut with additives like propylene glycol, and some are not. The Pure Cure and Absolute Xtracts brand cartidges test results show that these products do not contain any type of additive. The rest of the cartridges tested in this sample did test as having been cut with some type of additive.