A tan is a natural mechanism of the human body to guard itself against the harmful UV rays of the sun.
Rays
Preventing Wrinkles With Sunscreen
Submitted by Vicky on Tue, 05/20/2008 - 10:45.Exposure to ultraviolet light, UVA or UVB, from sunlight accounts for 90% of the symptoms of premature skin aging including wrinkles.
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