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Sunlight, vitamin D and the prevention of cancer: a systematic review of epidemiological studies. Rhee HV, Coebergh JW, Vries ED. Eur J Cancer Prev. 2009 Aug 26. [Epub ahead of print] PMID: 19730382 We, therefore, conclude that there is accumulating evidence for sunlight as a protective factor for several types of cancer. The same conclusion can be made concerning high vitamin D levels and the risk of colorectal cancer. This evidence, however, is not conclusive, because the number of (good quality) studies is still limited and publication biases cannot be excluded. The discrepancies between the epidemiological evidence for a possible preventive effect of sunlight and vitamin D and the question of how to apply the findings on the beneficial effects of sunlight to (public) health recommendations are discussed.

Towards an adequate intake of vitamin D. An advisory report of the Health Council of the Netherlands R M Weggemans, G Schaafsma and D Kromhout Eur J Clin Nutr advance online publication, July 22, 2009; doi:10.1038/ejcn.2009.67

Lips P. Vitamin D physiology. Prog Biophys Mol Biol. 2006 Sep;92(1):4-8. Epub 2006 Feb 28. Review. PMID: 16563471 [PubMed - indexed for MEDLINE]

What can high-vitamin D foods do for you? * Help prevent a growing list of chronic diseases, including type 2 diabetes, heart disease, hypertension, osteoporisis, breast cancer, colon cancer, and ovarian cancer * Help keep your bones and teeth strong and healthy * Regulate the growth and activity of your cells * Reduce inflammation What events can indicate a need for more foods rich in vitamin D? * Bone pain and/or soft bones * Frequent bone fractures * Bone deformities or growth retardation in children