A set of 15 papers reviewing the evidence that ultraviolet-B (UVB) irradiance and vitamin D reduce the risk of many types of cancer was just published in the January 2013 issue of the peer-reviewed journal Anti-Cancer Agents in Medicinal Chemistry. The issue was organized by Dr. Stefan Pilz and should be considered a “symposium in print.” All papers have open access at the journal’s website. The authors of the papers are recognized international experts on vitamin D and cancer. This blog summarizes some of the conclusions of the papers, taking issue with some of them. The papers are discussed in the order in which they appear in the issue.