Tetrahydrocannabinolic acid (THCA) is not your normal THC. It is the cannabinoid precursor to THC. When it really is subjected to gentle or heat, it undergoes a course of action called decarboxylation, which ends up in it shedding its carboxyl group and turning it into THC. Without the need of THCA, there would not be THC.When you buy your vape it