The endocannabinoid system (ECS) is a complex cell-signaling system identified in the early 1990s by researchers exploring THC, a well-known cannabinoid. The ECS plays a critical role in regulating a range of functions and processes, including sleep, mood, appetite, memory, and reproduction. It consists of endocannabinoids, receptors, and enzymes that work together to maintain homeostasis within the body.