Short for tetrahydrocannabinol, THC is the component in cannabis responsible for the plant’s psychoactive effects. When you feel “high” after using cannabis, that’s because of THC. THC is a cannabinoid, a category of chemicals that interact with the body’s endocannabinoid system. By attaching to cannabinoid receptors in the brain, THC activates neurons that influence pleasure, memory, thinking, coordination, and time perception. […]