Exposure to ultraviolet radiation is the main cause of premature aging. UV radiation is emitted not only by the sun but also by indoor tanning beds. Sunscreen, particularly a broad spectrum sunscreen that protects the skin from both UVA and UVB is one of the most effective ways to prevent wrinkling and aging of the skin. How wrinkled your skin becomes depends on many factors including your skin tone and history of long term or intense exposure to UV radiation. Frequent indoor tanners can be exposed to UV doses as much as 12 times that of the sun. People with skin who have a history of UV exposure are particular susceptible to wrinkling and skin damage.