My daughter has Endometriosis, which if you have experienced this, you know it comes with paralyzing cramps. My daughter has tried essential oil rubs which didn't work and doesn't want to be on birth control the rest of her life. I had her try this and a few minutes after smoking the cramps are gone. This is a life saver for her. I feel any type would work but this is the one she has been using. It also works great for headaches.