| http://www.w3.org/ns/prov#value | - Similarly, assertions that sunscreen use induces vitamin D deficiency, leaving us vulnerable to cancers and other medical problems, are unproven. vitamin D is essential for strong bones and a healthy immune system, but a recent review of 1,000 studies by the Institute of Medicine (IOM) in Washington, DC, determined that the vast majority of Americans take in enough vitamin D ,and found no sound ev
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