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New Study Says Sun Exposure Can Break Down Collagen in Just Two Days

In a new study out of the University of Michigan Medical School, researchers prove that exposure of UVA1 rays in the sun can cause skin damage at the molecular level in just two days. In the study, the dermatologist researchers showed that after only two days of exposure to the ultraviolet A1 (UVA1) light, the skin began creating molecules that break down collagen, which are the proteins responsible for making the skin tighter, firmer and more youthful. The UVA1 light is the light found in tanning salons and makes up most of the UV light people are exposed to in a typical day. It is typically UVB light that is thought to cause premature aging, as that is the ray that causes the skin to burn. But this study shows that UVA light can cause wrinkles and collagen loss. UVA1 light makes up the majority of the UV light that is shone on us throughout the day. The studies also showed that the mild tanning that occurs with exposure to the UVA1 light does not protect the skin from further damage, dismissing the notion that getting a tan will protect your skin from sun damage. The only sunscreen ingredients that protect the skin from UVA1 light are zinc oxide and avobenzone. Windows and clothing will not fully protect the skin from this type of UV light. The findings from the study were published online in JAMA Dermatology.
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Schweiger Dermatology

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