According to a research, the risk of breast cancer could be slashed by up to 50 per cent by spending an average of three a day exposed to sunlight.
Laboratory tests suggested that breast cells are capable of converting vitamin D to a hormone with anti-cancer properties.
The U.S. research, which followed nearly 119,000 adults for two decades found men who got at least 600 IU of vitamin D per day were 16 per cent less likely to develop heart problems or stroke than men who got less than 100 IUD. But there was no such pattern among women, the researchers at Harvard School of Public Health found.
Both findings should be balanced in terms of the skin cancer risks of exposure to the sun, experts cautioned.
The results were published in the American Journal of Epidemiology.