Tetrahydrocannabiphorol (THC-P) is a naturally occurring phytocannabinoid first isolated from Cannabis Sativa in 2019 by scientists in Italy performing analysis on a strain known as FM2. Structurally the only difference between THC-P and THC is that THC-P features a tail chain extended from pentyl to heptyl. This increased tail length is believed to contribute to higher binding affinity to both the CB1 and CB2 receptors and may also have unique properties.

It is the strongest naturally occurring cannabinoid known to science. THC-P also has the ability to bind to the CB1 receptors in the body's endocannabinoid system 33 times more than Delta 9.