The skin of the human body naturally does not have enough ability to deal with the harmful effects of the harmful rays of the sun. Sunlight has a wide range of waves with different wavelengths.
UVA is one of the types of ultraviolet rays emitted by the sun that penetrates the dermis layer of the skin and causes skin aging. As you know, the skin consists of three layers: epidermis, dermis and hypodermis. Collagen and elastin fibers that create and maintain elasticity and youthfulness of the skin are located in the dermis layer. UVA rays penetrate this layer and create free radicals and destroy collagen and elastin.