According to foreign media reports, hypertension is the main cause of stroke and a major risk factor for cardiovascular disease. So what can people do to lower blood pressure besides medication, diet changes, weight loss, and exercise? Research suggests that LED blue light may help.
A randomized study from the University of Surrey in the United Kingdom showed that 14 healthy male volunteers were exposed to blue light for 30 minutes in one day and then illuminated by another light without blue spectrum for 30 minutes on the second day. It is reported that the wavelength of blue light is about 450 nm, which is similar to the visible blue light wavelength in sunlight.
As a result, they found that exposure did not have any effect under another light, and blue light caused a reduction in systolic blood pressure by nearly 8 mmHg. According to researchers at the university, this phenomenon is similar to the trial of antihypertensive drugs.
In addition, blue light seems to reduce arterial stiffness and increase nitric oxide levels, one of which is a cardiovascular health-related signaling molecule. Researchers believe that blue light can cause the skin to release nitric oxide and let it enter the bloodstream. There, it begins to relax blood vessels, increase blood flow and lower blood pressure.
Professor Christian Heiss of the University of Surrey said that in the absence of drugs, exposure to blue light provides innovative treatment for precise blood pressure control. This is especially helpful for people whose blood pressure is not easily controlled by drugs, such as the elderly.
Related research reports have been published in the European Journal of Preventative Cardiology.
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