Simply put, the endocannabinoid system (ECS) is a biological system that helps to keep our bodies in optimal balance or homeostasis. The ECS consists of a collection of receptors that run throughout our bodies and have a variety of functions. These receptors help regulate functions such as sleep, mood, pain, reproduction, and even digestion. Think of them as messengers that send your body signals to stay in homeostasis. When something falls out of balance or becomes deficient, the body becomes vulnerable to a variety of conditions and/or illnesses. Though our body naturally produces cannabinoids, they too can be supplemented, just like vitamins.