Be cautious both before and after sun exposure Be cautious both before and after sun exposure

Even hours after being exposed to UV (or UVA) rays, they continue to cause damage and can lead to skin cancer. 

This is the conclusion that was reached by researchers from Yale University (U.S.), the University of São Paulo and the Federal University of São Paulo (Brazil), Fujita Health (Japan) CEA Grenoble Center (France). “During the three or four hours after being exposed to the sun, lesions and breaks in the DNA can occur that lead to skin cancer mutations. This means that our skin continues to suffer from the same radiation it did when we were in the sun,” the study explains. 

Experiments conducted on mice and human cells reveal that melanin, the pigment that blocks ultraviolet radiation, is responsible for this delayed reaction to the sun. Scientists help clarify that people can take preventative measures to avoid these risks, such as staying out of the sun between 10:00 a.m. and 2:00 p.m., and using a hat and sunscreen. Because of this discovery, new lotions can be developed to use after sun tanning to avoid further damage. 

The exposure to ultraviolet (UV) radiation is the main risk factor for most forms of skin cancer. Sunlight is the main source of ultraviolet radiation.