http://articles.mercola.com/sites/articles/archive/2007/02/17/the-sunshine-vitamin-repairs-your-skin-and-boosts-your-immune-system.aspxSunshine may be able to help fight skin diseases and cancer by attracting immune cells to the skin surface. Sunshine causes the skin to produce vitamin D3, and immune cells in the skin, known as dendritic cells, can convert vitamin D3 into its activeenCommunityServer 2008.5 SP1 (Build: 31106.3070)