Singer Olivia Newton John announced her plans to support research and promote medical cannabis after using it to treat her bout with breast cancer.

The singer will be raising money for the Olivia Newton-John Cancer Wellness and Research Center in Melbourne, which she launched in 2012 to champion cancer-related causes and research.

Newton-John was first diagnosed in 1992, but said her cancer returned in May. Cannabis helps ease her symptoms of back pain which began during her second battle with cancer.

Newton-John said she decided to try medical cannabis as treatment after consulting with her doctors, natural therapists, and medical teams at her research center.

“I am getting my mobility back to normal all the time, but I have done tests of course to see that things are better, have had my blood work tested, and these things lead me to believe that I am on top of it,” said Newton-John.

Cannabis is legal for medicinal and social use in Newton-John’s current home state of California, but fewer than 150 patients in her home country of Australia have access to medical cannabis. Although it was legalized in 2016, cultivation licensing and regulations are still an issue for those who wish to cultivate or possess.