How Sun Exposure Causes Wrinkles and Skin Cancer

Sun exposure is a major contributor to skin damage, primarily due to the ultraviolet (UV) radiation emitted by the sun. UV radiation is categorized into two main types: UVA and UVB. Both types of UV radiation penetrate the skin, but their effects and the depth to which they penetrate differ significantly. UVA rays, which account for approximately 95% of the UV radiation reaching the Earth's surface, penetrate the skin more deeply than UVB rays. UVA radiation can reach the deeper layers of the skin, known as the dermis, where it can cause long-term damage by breaking down collagen and elastin fibers. This degradation of collagen and elastin leads to the formation of wrinkles and a loss of skin elasticity. On the other hand, UVB rays primarily affect the outermost layer of the skin, the epidermis, and are the primary cause of sunburn. However, both UVA and UVB rays contribute to…

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