The Endocannabinoid System (ECS) is a complex cell-signaling system identified in the early 1990s by researchers exploring THC. Experts are still trying to fully understand the ECS. But so far, it is believed to play a role in regulating a range of functions and processes, such as sleep, mood, appetite, memory, reproduction and fertility, inflammation, liver function, pain, stress, and nerve function. The ECS exists and is active in your body, even if you do not use cannabis. The ECS involves three core components: endocannabinoids, receptors, and enzymes. - Endocannabinoids, also called endogenous cannabinoids, are molecules made by your body. They are similar to cannabinoids, but they’re produced by your body. - Endocannabinoid receptors are found throughout your body. Endocannabinoids bind to them to signal that the ECS needs to take action. - Enzymes break down endocannabinoids once they have carried out their function.