How is THCA and CBDA different from THC and CBD? Which is better?

From Project CBD: CBD and CBDA are different cannabinoids, with their own set of properties. THC and THCA are also different compounds. CBDA and THCA occur naturally in the cannabis/hemp plant; these compounds convert to CBD and THC when they are heated. Unlike THC, the THCA that exists in the cannabis plant is not psychoactive and does not make a person feel high upon consumption. CBDA and CBD also are not psychoactive like THC and do not make a person feel high upon consumption. Generally speaking, the raw, unheated “acid” versions of cannabinoid compounds, such as CBDA and THCA, are effective at lower doses than the “neutral” cannabinoid compounds, CBD and THC. One must “decarboxylate” CBDA (by heating it) to turn CBDA into CBD. The same goes for THCA and THC. 

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