Editor's note: This article has been reviewed and updated for accuracy in 2026. Just imagine it — you find not just one, but a total of three, irregular and scary bumps on your skin. You know something’s not quite right, but your agenda is full and you’re, frankly, more than a little freaked out. After dragging yourself to the doctor and hoping, with everything you’ve got, that the biopsy will reveal you were worried about nothing, you discover you’ve got skin cancer. Basal cell carcinoma. Most people would probably despair. Then again, Rick Simpson isn’t most people. Now a famous Canadian medical cannabis activist, Rick was just a guy with cancer who read all the studies he could when he got his diagnosis back in 2003. Having relied on marijuana to nurture his wellbeing before, Rick immediately got to work when he read a scientific study that revealed THC could kill cancer cells in rodent models. *Spoiler alert: Rick Simpson’s efforts were a success! That’s the story of how Rick Simpson Oil — or just plain “RSO” in the community — came to be. What is it, though, and how can you benefit from it? What Is Rick Simpson Oil? Rick Simpson Oil is a full extract cannabis oil. RSO is typically made with <a href=