We know, we know, you were nearly finished mastering the nuances of star cannabinoids THC and CBD, and how they impact your high; you know how they synergize with other cannabis-derived compounds called terpenes, and maybe you have looked into the much-disputed entourage effect. Endocannabinoid system? No problem. But now we’re going to throw a wrench in that with another compound: THCA.    
Cannabis plants produce over 100 different cannabinoids, all of which contribute to how a smoking, vaping, edible, or topical experience will affect you. While you may not realize it, THCA is a part of the plant, and it’s time you learn more about it. 
THCA is the acidic form of THC, full name: tetrahydrocannabinolic acid. As a cannabis plant matures and its buds grow, its terpene and cannabinoid content begin to develop. The first cannabinoid the plant will develop is CBGA, also called the “mother of all cannabinoids” because it will eventually break down and produce primary cannabinoids, like THCA and CBDA. 
THCA is not intoxicating if ingested. Chemically, it has an additional molecular carboxyl ring, which prevents it from binding to receptors in the brain responsible for feeling high.