Vi­tamin D and cal­cium sup­ple­men­ta­tion re­duces can­cer risk: re­sults of a ran­dom­ized trial

Randomized trial

Link: http://​​www.ncbi.nlm.nih.gov/​​pubmed/​​17556697%20

From conclusions:

“Improving calcium and vitamin D nutritional status substantially reduces all-cancer risk in postmenopausal women.”