Even though it is widely known that long-term exposure to ultraviolet light is harmful, moderate exposure to sunlight is essential for vitamin D synthesis in the human body. Although vitamins can also be taken in the form of supplements, but when it comes to the natural production of the human body, the effect of sunbathing is the most significant. It is difficult for people to live in short-term latitudes when the days and nights are long enough. For the elderly with mobility problems, it is even more impossible to spend a long time in the sun. < / P > < p > the good news is that UV LEDs (black light flashlights) can be a good supplement even if there is not enough sunshine. At the same time, the program can avoid the health problems caused by excessive exposure to the sun, such as premature skin aging or cancer. It is reported that a team from Nagoya University first tested the minimum dose and intensity of ultraviolet radiation required to synthesize vitamin D in mice. After 12 weeks of treatment, higher levels of vitamin D were detected in serum of mice receiving UV LED therapy, and bone mineral density, muscle mass and strength were improved. What’s more, the skin is not damaged. < / P > < p > at present, the research team has developed a portable UV LED device for the elderly, aiming to prevent or treat osteoporosis and muscle quality deterioration and other related problems. Yoshihiro Nishida, chief scientist, said: “with this device, all elderly people can obtain the same or more adequate vitamin D as sunbathing in a simple, safe and low-cost way.”. Details of the study have been published in the recently published journal scientific reports. Privacy Policy