What is THC A?
THC-A, or tetrahydrocannabinolic acid, is one of the primary cannabinoids found in raw and live cannabis plants. When these plants are left untreated, they naturally contain only small amounts of THC (Delta-9-tetrahydrocannabinol), the psychoactive compound that gets users "high." Instead, the majority of the THC in the plant exists in its acid form.
By itself, this acid is non-psychoactive. However, when subjected to heat in a process known as decarboxylation, THC-A is converted to THC. This process happens, for instance, when cannabis flowers are smoked or vaporized. It's also why cannabis edibles require a baking or heating step in their preparation, to convert the TetraHydroCannabinolic Acid to the active THC.