(from cosmeticscop.com, May 11, 2009)
Protecting skin from the sun has become an intense controversy for two major reasons. Number one is our basic need for vitamin D, which is produced by the skin's exposure to sun, meaning that it may be problematic to limit exposure or by some opinions, use sunscreen at all. Number two concerns sunscreens and the types of active ingredients used to create the SPF (Sun Protection Factor) rating which might have unwanted systemic consequences.
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