Delta-9 refers to Delta-9-tetrahydrocannabinol (Δ9-THC), which is the primary psychoactive compound found in cannabis. It is responsible for most of the “high” associated with marijuana use. Delta-9 THC binds to receptors in the brain and nervous system, affecting mood, memory, coordination, and other functions.

Delta-9 THC is commonly found in both medical and recreational marijuana products, including flower, edibles, concentrates, and oils. It’s distinct from other cannabinoids, such as CBD (cannabidiol), which does not produce psychoactive effects. Delta-9 THC’s potency and effects vary depending on the strain and the method of consumption.

It is regulated in many parts of the world, with varying legality depending on the region and whether it is used for medical or recreational purposes.