Why doesn't the skin turn black immediately after sunburn? Find the cause of UV rays | After a period of time | Skin
Why does the skin not immediately turn black after being exposed to sunlight, but only change color after a period of time? A new study has revealed the mystery - after being exposed to ultraviolet radiation, the human body prioritizes repairing DNA damage in skin cells, inhibiting the mechanism of skin pigmentation and delaying the occurrence of "tanning".
To protect the skin from UV radiation damage, the human body repairs DNA damage in skin cells and increases the production of melanin, making the skin darker and preventing future radiation damage. But many people don't immediately turn black after going to the beach to bask in the sun.
The University of Tel Aviv in Israel recently released a statement stating that a study led by researchers from the university has found that when the human body is damaged by ultraviolet radiation, it will first activate the DNA repair mechanism of skin cells, temporarily inhibiting the relevant mechanisms of pigmentation. Only after cells complete the repair to the best of their ability, will they begin to produce more melanin. This is also why when exposed to sunlight, the skin does not immediately turn black, but only begins to change color after hours or even days.
In this study published in the Journal of Dermatology in the United States, researchers also introduced how proteins that play an important role in this DNA repair mechanism operate, and stated that these research findings lay the foundation for further related research and provide inspiration for expanding innovative methods to prevent skin diseases and skin cancer.