Sunlight may help to reduce high blood pressure
British researchers found exposure to sunlight alters level of nitric oxide in skin.
According to a new study Sunlight may help to reduce high blood pressure.
British researchers found exposure to sunlight alters the level of nitric oxide in the skin, dilating blood vessels and thus easing hypertension.
"Small amounts of NO [nitric oxide] are transferred from the skin to the circulation, lowering blood vessel tone.
The team analyzed 24 volunteers who were exposed to ultraviolet (UVA) light from tanning lamps for two 20-minute sessions.
In one session, the volunteers were exposed to both the UVA rays and the heat of the lamps.
In the second, the UV was blocked so that only the heat of the lamps affected the skin.
The findings back up data about blood pressure and cardiovascular disease, which are known to vary according to season and latitude.
Higher levels are observed in winter and in countries that are farther from the equator, where ultraviolet from the sun is lower.