January 19, 2014
Here’s why sunbathing feels so good: It may lower your blood pressure, British researchers reported Friday.
Just 20 minutes of ultraviolet A (UVA) sunlight lowered blood pressure by a small but significant amount in 24 volunteers, they report in the Journal of Investigative Dermatology. Further checks suggest the sun does this by increasing levels of nitric oxide, a chemical linked to blood flow.
The effects are so strong they may help explain why people who live in the darker north, like the Scots, have higher rates of death from heart disease, Richard Weller of the University of Edinburgh and Martin Feelisch of the University of Southampton say.
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