Scientists have developed a new test that identifies patients who could benefit from the cheap treatment.
They found that the people whose cancer cells “fed” off high-energy compounds were more likely to see their tumours spread or to die.
This meant they could be helped by being given the diabetes drug, metformin, which stops the “fuel supply” for aggressive cancer cells.
Professor Michael Lisanti, from the Breakthrough Breast Cancer Research Unit at the University of Manchester, said: “We’ve shown that the saying, ‘you are what you eat’ holds true for cancer. The food cancer cells consume is crucial to how well a patient does and what...