Blue light refers to high-energy visible light with a wavelength of 400~500 nm, which is commonly found in computers, mobile phones, projectors, LED displays, laser pointers, and the like. Among the seven colors of visible light, the closer to the visible light in the ultraviolet region (such as violet light and blue light), the stronger the energy, the greater the damage to the human body. When it comes to the harm of blue light, many people know that it can cause eye fatigue, dryness and affect vision health. But maybe you don’t know, Blu-ray will “invade” the skin.
Blue light causes melanin deposition in the skin, especially in the epidermis layer and deeper skin layer, resulting in darkening, dullness and long spots on the skin. At the same time, blue light and ultraviolet light will promote the production of reactive oxygen species in epithelial cells more and more active, thereby accelerating skin aging, resulting in lack of elasticity and wrinkles.
Other studies have shown that because blue light is longer than ultraviolet light, it can penetrate deep into the skin, causing DNA oxidative damage, reducing the production of collagen and elastin, causing skin problems such as enlarged pores and dark circles. In addition, blue light also stimulates the brain and inhibits melatonin secretion. If you often use electronic products before going to bed, strong blue light will destroy the balance of hormone secretion, which will affect the quality of sleep, indirectly lead to dark yellow skin, acne, hair loss and other issues.
To protect against blue light hazards, the use of electronic equipment should be minimized to avoid prolonged periods of stay or exposure to blue light. When using a smartphone or tablet at night, the night mode should be turned on to reduce the radiation of blue light to the human body. At the same time, in daily life, you can eat more foods rich in vitamin A, vitamin E, selenium, β-carotene, etc. These are natural antioxidants.
For those who need to face mobile phones, computers and other electronic devices for a long time, it is recommended to take certain measures for proper protection, such as applying mineral sunscreen or foundation. (Deputy Chief Physician, Department of Dermatology, Beijing Hospital of Traditional Chinese Medicine, Capital Medical University) Zhou Tao