Rick Simpson is not a clinical or scientific researcher and, as of 2015, has never made any discoveries about cancer. On his website, Simpson claims that hemp oil is a cure for all forms of disease.
Rick Simpson has made claims about hemp oil being a treatment or cure for numerous medical conditions, including cancer. According to Cancer.gov, there is no evidence as of 2015 that cannabis is a cure or even an effective treatment for any human cancer. Cannabis may play a role in the palliative care of cancer patients. According to WebMD, cannabis is effective for relieving pain and treating the nausea caused by chemotherapy.