Having high levels of vitamin D could help women to survive breast cancer, new research suggests.
Women with increased amounts of the sunshine vitamin were nearly a third more likely to survive the diagnosis.
Experts believe it works by inhibiting the reproduction of cancerous cells – effectively killing them.
Vitamin D, obtained from sunlight, helps to strengthen bones and a deficiency has been found to be a risk factor in various cancers.
It can also be found in fatty fish oils, fortified milks, cereals and consumed in supplements – but it is believed that one in five adults are deficient in the nutrient.