Is there any relationship between vit d deficiency and lupus?

As of now no: As far as i know no. There are currently many efforts to link vitamin d to many diseases but mot had not led to any clear cause and effect relationship

Yes it can: It has been described but it is unclear what effect it has on sle actvity. Studies have related to sle activity and development of sle . It has been suggested that repletion helps lupus. We know that vitamin d is involved in the immune response and thus one could speculate a role for vitamin d. I certainly want my patients to take vitamin d and have normal levels. I feel this may help.

Yes-causes &Rx helps: People with low vit. D levels are more likely to get sle than those with higher levels- see http://www.Medicalnewstoday.Com/articles/232288.Php also, recent research is showing impressive preliminary results as a very safe & effective treatment: http://www.Sciencedaily.Com/releases/2012/10/121016203902.Htm take d3 & not the far-inferior d2, try to get a level of 80-100, do serum levels to monitor.