![](https://blogs.sas.com/content/efs/files/2019/07/woman_hand_on_head.jpg)
The Endocannabinoid System
It’s been dubbed “the most important body system that you’ve never heard of.” The endocannabinoid system (ECS) was discovered in the early 1990’s. It’s not a structural system like the nervous or vascular systems. Instead, the ECS is made up of a network of receptor sites in almost every part