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Zinc oxide helps protect the lifeguards from damaging UV sunlight. How does this cream protect from the UV rays of the Sun?
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Zinc oxide helps protect the lifeguards from damaging UV sunlight. How does this cream protect from the UV rays of the Sun?

User Oderfla
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it reflects sunlight.  It's a physical barrier (in comparison to some sunscreens which are chemical blocks).  Sunlight is mostly white light and zinc oxide reflects white light
User Laurisvr
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