Why does ultraviolet light accelerate aging? Why does ultraviolet light make the skin darker?

Ultraviolet rays exist every day and are unavoidable, so if some preventive measures are not taken for a long time, it will cause skin damage. So why do ultraviolet rays accelerate aging? Why does ultraviolet light make the skin darker?

Why does ultraviolet light accelerate aging?

The damage caused by ultraviolet rays to the skin seems to be small, but if exposed to it for a long time, the impact will definitely be beyond your imagination. When middle-aged women engage in outdoor activities, they must take good sun protection measures when encountering strong sunlight. Excessive ultraviolet radiation can cause serious oxidative damage to the skin and accelerate the deposition of melanin on the skin surface, creating color blocks and spots, accelerating the formation of wrinkles, and causing the skin to age. In addition to sunlight, middle-aged women should also be careful not to be exposed to ultraviolet light for a long time.

Why does ultraviolet light make the skin darker?

Because the radiation of long-wave ultraviolet rays (UVA) and medium-wave ultraviolet rays (UVB) in sunlight has a proliferation and activation effect on melanocytes in the human epidermis. The density of melanocytes in the epidermis of exposed areas is twice that of non-exposed areas. At the same time, ultraviolet rays enhance the dopamine response of melanocytes, causing the skin in exposed areas to show excessive pigmentation. So sun exposure can make your skin darker. But at the same time, for humans, melanin is a barrier that prevents ultraviolet rays from damaging the skin. Therefore, darkening of the skin due to sun exposure is a human reaction to photodamage and self-protection, which is beneficial to the human body.

Why does ultraviolet light burn the skin?

Our skin is very fragile and can be easily damaged if we are not careful. The damage caused by ultraviolet rays is sometimes very great, especially our face, which is an exposed part of the skin and is easily exposed to ultraviolet rays. Ultraviolet rays are very harmful to the skin, especially for some people who do not pay attention to facial sun protection, which will directly cause serious damage to our skin!