What causes the skin to age? One of the Leading Causes of Wrinkles: Sun Exposure. A "healthy" tan is anything but. Tanning may cause skin damage. The sun's ultraviolet rays can penetrate and damage the skin's support structures. Most wrinkles are caused by sun exposure throughout life -- and it's never too late to slow down and eventually stop the progression. With Phil&Bex Collagen Plus, now you can get protection from the sun and at the same time replenish the collagen in your body. Ask your doctor today