What is Delta 9 THC? Delta 9 THC, short for delta-9-tetrahydrocannabinol, is the primary psychoactive compound found in cannabis. It’s the cannabinoid most responsible for the “high” that people experience when they consume marijuana. Delta 9 THC interacts with the endocannabinoid system in the human body, particularly binding to the CB1 receptors in the brain and nervous system. This interaction can result in various effects, including euphoria, relaxation, altered sensory…