Researchers from the University of California at San Diego examined lung cancer rates for more than 100 countries around the world. They found that countries located near the equator, where there's lots of sun, generally had lower rates of lung cancer.
The theory is that the sun triggers vitamin D production, which may help protect against lung cancer.
Doctors recommend people get some sunlight, about 15 minutes per day, to ensure healthy vitamin D levels. But they also stress that too much sun can increase the risk for skin cancer.
