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Sunscreens can block vitamin D |
 At least some sunlight is necessary to stay healthy
Many doctors say ultraviolet light from the sun or a tanning machine is dangerous because of the risks associated with skin cancer. But some health experts, such as Dr. Michael Holick of Boston University, disagree.
"I believe that Americans have gone overboard with their fear of the sun. I think that sensible exposure to sunlight is really important for your overall health and well-being," says Holick...read the full article by Robert Bazell, chief science and health correspondent for msnbc.com
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