Sunlight lowers blood pressure

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Scottish scientists confirm positive effects from solar radiation

Sun is good - Scottish scientists have confirmed in a recent study what every sun worshiper would immediately sign and have now presented their results at a dermatologist conference in Edinburgh.

Lower blood pressure after exposure to UV light. According to this, sunshine would lower blood pressure and could even extend life, regardless of the vitamin D formation. For their study, the researchers led by Richard Weller from the University of Edinburgh put 24 volunteers for 20 minutes each under a UV lamp and then under a heat lamp and measured the blood pressure and the vitamin D level of the participants before and after the experiment. The result: Following UV radiation, the test subjects' blood pressure dropped by about 4 mmHg for one hour - while no effect was observed when exposed to pure heat, said dermatologist Richard Weller in his lecture at the dermatologist's conference in Edinburgh.

UV light releases nitrogen monoxide The researchers see a possible explanation for the effect in the ability of UV radiation to extract nitrate (chemically: NO3-) from special stores in the skin and to convert it to nitrogen monoxide (NO), which the blood vessels expands, relaxes the vascular muscles and can thus lower blood pressure. Although this had not decreased much on a personal level in the course of the study, "but enough in the general population to postpone the death rate for heart diseases in the population," said Richard Weller.

Vitamin D level remains unchanged due to the radiation According to Weller, the scientists deliberately chose UVA rays for their investigation because they do not produce vitamin D, "because vitamin D is produced by UV-B rays and we wanted our cause of that Separate the vitamin D matter. ”The result: The test subjects' vitamin D level remained unchanged due to the radiation, which would confirm that sunlight has other effects than the formation of vitamin D and, accordingly, vitamin D tablets do not replace sunlight could.

Advantages of the sun for the cardiovascular system outweigh the risk of skin cancer But the sun is of course not entirely harmless - and even if the risk of skin cancer is still not to be underestimated, Weller would like to encourage rethinking, because cardiovascular diseases and Strokes from high blood pressure would lead to deaths many times more often than skin cancer. Accordingly, Weller summarizes in his lecture: "We suspect that the advantages that sunlight has for the cardiovascular system outweigh the disadvantages, i.e. the risk of skin cancer." (Nr)

Image: Sven Klöpping /

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