According to Australian researchers, measured doses of sunlight could reduce asthma. The team studied the effects of ultraviolet light on symptoms such as inflamed airways and lungs.
Fifteen to 30 minutes of ultraviolet light exposure prior to allergen exposure significantly reduced asthma-like symptoms.
The UV exposure caused the mice to produce a type of cell that can be transferred into other mice before they have been sensitized to an allergen, and will prevent the development of symptoms in the new mice.The researchers believe this means that sunlight can suppress specific immune reactions, and they are working to better understand the mechanism. They expect that their study of asthma and ultraviolet light will take several years to complete.