The similarities between the two cannabinoids lie in their chemical structures and their names. THC’s scientific name is delta-9-tetrahydrocannabinol, or delta-9 THC, or just delta-9. Delta-8 is short for delta-8-tetrahydrocannabinol, or delta-8 THC. Delta-8 THC can cause effects similar to regular delta-9 THC—but they will be much less potent. 

Delta-8 and delta-9 are both forms of THC. In common usage, when people refer to THC they are talking about delta-9 THC. (In this…

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