By Marc Sorenson, EdD, Sunlight Institute
As I was searching the National Library of Medicine (PubMed) for information on sunlight and its relationship to breast cancer, a profoundly important piece of research emerged. An investigation from Iran on the association between cancer risk and vitamin D showed that low vitamin D predicted only a slightly increased risk of breast cancer. However, among women who totally covered themselves and thereby had no sunlight exposure, there was a more than a 10-times increase in the risk of the disease.
The message of the study is that sunlight avoidance, as promulgated by the sunscreen industry and dermatological societies, is one of the biggest frauds ever perpetrated. Coupled with our pitiful nutritional habits, it guarantees that breast cancer will remain rampant. Women (and men), please take care of yourselves by getting regular, non-burning sunlight exposure. That habit correlates to a reduction not only in breast cancer, but also prostate cancer and about 20 other major cancers. The sun is not your enemy. Just use it wisely and don’t burn. And while you do that, please eat lots of berries, dark fruits and green vegetables.
I have written many articles on this site regarding sunlight and cancer. Use the search bar to look up and read them. I will shortly post another blog on prostate cancer and sunlight. Until then, happy and safe sunbathing!
 Bidgoli SA, Azarshab H. Role of vitamin D deficiency and lack of sun exposure in the incidence of premenopausal breast cancer: a case control study in Sabzevar, Iran. Asian Pac J Cancer Prev. 2014;15(8):3391-6.