ISLAMABAD: The health benefits of olive oil are wide-ranging; studies have linked the fat to reduced risk of obesity and heart disease, as well as cognitive improvements. Brain cancer is the presence of a malignant tumor in the brain – that is, a tumor comprised of cancer cells. Study co-author Dr Gracjan Michlewski, of the Wellcome Trust Centre for Cell Biology at the University of Edinburgh in the UK and colleagues say that they are unable to conclude whether dietary intake of olive oil protects against brain cancer.