Exactly what is THCA and how does it vary from THC? How can THCA Vary from THC? Chemical Construction: THCA and THC have identical molecular buildings but vary in a single vital facet: THCA includes a carboxylic acid group (that's why the "A" in its title), although THC will not. https://raymondorauk.izrablog.com/34280286/the-ultimate-guide-to-raw-hemp-buds