A compound found in cannabis may provide a new breast cancer treatment, US scientists have said.
Experts found that a compound called CBD blocks a gene that is thought to be involved in the spread of cancer around the body - a process called metastasis.
It could therefore provide a non-toxic cancer treatment, according to scientists at the California Pacific Medical Centre Research Institute.
Lead researcher Dr Sean McAllister said that cancer treatment options for aggressive forms of breast cancer are limited.
The expert revealed: "Those treatments, such as chemotherapy, can be effective but they can also be extremely toxic and difficult for patients.
"This compound offers the hope of a non-toxic therapy that could achieve the same results without any of the painful side-effects."
More than 44,000 people are diagnosed with breast cancer in the UK every year, the vast majority of whom are female.