Vitamin D looks more and more like a sharp weapon against cancer. An American study points towards high Vitamin D status being a great advantage, if you have lung cancer.
References: 1. American Association for Cancer Research. Press Release 18 April 2005. 2. Trump DL et al. Anti-tumor activity of calcitriol: pre-clinical and clinical studies. J Steroid Biochem Mol Biol. 2004 May;89-90(1-5):519-26. 3. Nakagawa K et al. 22-oxa-1{alpha},25-dihydroxyvitamin D3 inhibits metastasis and angiogenesis in lung cancer. Carcinogenesis. 2005 Feb 17;[Epub ahead of print].