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Different Levels of Vitamin D and Breast Cancer: A Review.
Authors: Modarresi-Ghazani F, Hejazi ME, Hejazi V

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In the last decade, there has been increasing evidence regarding the anti-proliferative effects of vitamin D. The purpose of present article was to review different aspects of vitamin D on breast cancer. We conducted a comprehensive search in electronic database including PubMed, Medline and Google Scholar for randomized clinical trials published in the last 5 years up to January 2016. A majority of the articles focused on the relationship between vitamin D and risk of breast cancer, and then on the vitamin D's effects on aromatase inhibitors side effects, vitamin D polymorphism and also breast cancer stage. The present literature was unable to prove any association between vitamin D and risk of developing breast cancer; however vitamin D polymorphism is involved in developing breast cancer. On the other hand, high serum level of vitamin D can decrease aromatase inhibitors’ musculoskeletal effects. This can make vitamin D eligible as an adjuvant therapy to cancer treatment. It is highly recommended to treat vitamin D deficiency and provide the ideal serum level of vitamin D among patients with breast cancer who are receiving aromatase inhibitors.