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for hypertension.
Scientists from the University of Surrey in the UK and the Heinrich Heine University in Düsseldorf, Germany conducted an experiment showing that blue light was so effective at lowering blood pressure. for the drug itself, which decreases the risk of developing cardiovascular disease.
Study participants were exposed to 30 minutes of whole body blue light at approximately 450 nanometers (a dose comparable to daylight). Then, another day, the same participants were exposed to a control lamp. Visible blue light, unlike ultraviolet (UV) light, is not a carcinogen
To evaluate the impact of treatment, blood pressure, arterial stiffness, dilation of blood vessels, and levels of blood storage. Nitric oxide in the participants' blood were measured before, during and two hours after irradiation with both lamps.
The results showed that exposure to blue light significantly reduced participants' systolic blood pressure in almost 8 mmHg while control light had no impact
]. The most surprising is that this reduction is similar to that observed in the clinical trials of drugs . In addition to the effects of lowering blood pressure, exposure to blue light has improved other markers of cardiovascular risk, such as reduced arterial stiffness and increased relaxation blood vessels . Scientists also discovered that exposure to blue light increased levels of nitric oxide, an important signaling molecule that protects the cardiovascular system.
The researchers suspect that blue light releases nitric oxide from the skin.
"Exposure to blue light provides an innovative method to accurately control blood pressure without medication, which would be particularly useful for those whose blood pressure is not easily controlled by medication. such as the elderly, "said Christian Heiss, a professor of cardiovascular medicine at the University of Surrey.
This is not the first time that scientists conclude this blue light has a positive impact on people's health. The blue lighting has been badociated with the improvement of mood. In fact, it is for this reason that thousands of Japanese stations have installed blue light as a way to reduce suicide rates.
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