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英国一项最新研究发现,阳光中的紫外线还有助于降血压。英国爱丁堡大学研究人员监测了24名志愿者经紫外线灯照射20分钟后的血压变化,结果发现他们的血压均出现下降,且这一效果可维持约1小时。对照实验中,研究人员屏蔽了灯的紫外线,其他因素都未改变,志愿者的血压没有变化。研究人员说,紫外线照射有助于人体中积存的氮释放到血液中去,并增加维生素D的活性。皮肤细胞会释放出一氧化氮,这种化合物有助于舒缓血管。
A new British study found that the sun’s ultraviolet rays can also help lower blood pressure. Researchers at the University of Edinburgh in the United Kingdom monitored blood pressure changes in 24 volunteers exposed to ultraviolet light for 20 minutes and found that their blood pressure decreased, and this effect can be maintained for about 1 hour. In a controlled experiment, researchers blocked the lamp’s UV light, none of the other factors changed, and the volunteers’ blood pressure did not change. The researchers said ultraviolet radiation helps to release nitrogen accumulated in the body into the blood and increase vitamin D activity. Skin cells release nitric oxide, a compound that helps soothe blood vessels.