When you apply sunscreen you might not be as well protected from the sun as you think,say researchers in Italy.Consumers have come to rely on the protection provided by sunscreen to prevent skin damage from the sun's harmful ultraviolet (UV)radiation.But chemists led by Nick Serpone and Angelo Albini at the University of Pavia have discovered that compounds routinely used as UV filters in commercial sunscreens do not have the protecting power previously thought.Exposing these compounds to UV light of the same wavelengths found in sunlight causes the molecules to degrade and lose their protecting abilities.And the researchers found that using certain combinations of compounds actually worsens this effect.
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