saral6359 saral6359
  • 16-07-2017
  • Health
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Because joan is concerned about skin cancer, she uses a sunscreen when she is outside. at what spf level will sunscreen start to interfere with vitamin d synthesis

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RomanEmpire1
RomanEmpire1 RomanEmpire1
  • 16-07-2017
At SPF 23 the sunscreen start to interfere with vitamin D.
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