Rick Simpson Oil is considered a concentrate in Oregon. Rick Simpson oil (RSO) is named after the man Rick Simpson. Rick Simpson made this form of cannabis concentrate famous by sharing his story about using cannabis oil on his skin cancer. RSO is made by soaking cannabis plant material in alcohol for a period of time. Then the alcohol is purged off and voila: you have a super concentrated cannabis oil known as RSO. To learn more about RSO visit our blog and see the links below.