Learn the types of diseases and illnesses on the CBD Oil Benefits List and discover what CBD is used for – changing lives… So, what is CBD oil used for? CBD has a surprisingly large number of therapeutic properties that have been shown in numerous, double-blind medical studies to successfully treat many medical conditions. CBD’s cancer-fighting potential is getting ever increasing attention and its therapeutic potential is being fully embraced by the Cancer research community worldwide. It is also used as a daily dietary supplement that can be consumed by adults and children alike to help prevent disease.