UV light penetrating the epidermis can cause DNA mutations, leading to disruptions in protein production and cell function, potentially causing skin cancer.

“UV light when it penetrates mostly that epidermal layer of the skin that outermost layer it can cause changes in the way that DNA functions it can cause mutations such that DNA which as many of you probably remember from high school biology DNA is transcribed into RNA and RNA is translated into proteins the proteins are the things that the cells produce they're actually made up of proteins well UV like can disrupt which DNA are expressed and how they are expressed in some cases leading to overproduction of too many cells or disruptions in the functions of cells and that's why people link UV light to skin cancer”