Some info on Sunlight and Vitamin D.
How much sun do you need for maximum Vitamin D?
10-15 minutes (full body) on a standard UV index of 7 day.
That’s 30 min in the middle of the day in Dubbo in winter (Max UV index 3)
UV index is here:
http://www.bom.gov.au/australia/uv/index.shtml
This is a very good article on Vitamin D:
http://www.overcomingmultiplesclerosis.org/Recovery-Program/Sunlight-and-Vitamin-D/
This quote is interesting: “This study showed that the correlation between low ultraviolet radiation and MS was considerably stronger than that between high UV and melanoma.”
Vitamin D and coeliac:
http://www.celiac.com/articles/21476/1/Vitamin-D-Preserves-the-Intestinal-Mucosal-Barrier/Page1.html