The cause of skin aging: "active oxygen"
Increase in "active oxygen" = oxidizing the body
The causes are ultraviolet rays, stress, diet, aging, smoking...
It is well known that,
In fact, blue light is also said to increase this "active oxygen."
Blue light has a longer wavelength than ultraviolet light and penetrates deeper into the skin.
The active oxygen produced penetrates into the skin, damaging cells and tissues.
The longer the wavelength of light, the deeper it penetrates into the skin.