Published on July 20, 2016

July 20, 2016

Almost all vitamin D researchers point to the iconic research of the Garland brothers as the beginning of research on vitamin D and cancer. It centers on the map below, which illustrates both the mean solar radiation in the US (black lines) and the incidence of colon cancer (low is light blue, high is dark red). Dr. Cedric Garland describes this map during his seminar talk, 2010, starting at minute 2:53. You can make your own map using the tool in the sidebar from the National Cancer Institute.

Drawing the initial connection between solar radiation and cancer, and the conclusion that vitamin D is a protective factor against colon cancer in the paper that followed, launched a host of studies – epidemiological, observational, and randomized control – on vitamin D and cancer.

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