THC free signifies that a DEA registered lab are unable to detect any THC in the oil. Their level of detection is .001% so theoretically there can be a trace volume of THC under the .001% threshold of detection. THCA is normally considered to be alright to choose, but like https://purecart60370.mybloglicious.com/48497128/pure-one-carts-no-further-a-mystery