Pure Care CBD Oil The Pure Care CBD Oil Ingredients work directly with your Endocannabinoid System (ECS). If you haven’t heard of this system, it runs throughout your body. Specifically, it’s concentrated in your brain and nervous system. And, it controls things like your body’s response to pain, stress, inflammation, and more. Your ECS releases endocannabinoids when you’re in pain to help relieve it. the same goes for when you’re stressed out about something.