<<I have come to the conclusion that the reason women have greater 
frequency of Reynaud's in the winter is vitamin D deficiency.>>

I am a Raynaud's suffered and I live in the high desert of Southern 
California where it is sunny year-round.  Even in the "dead of winter", 
we have a lot of sunny days.  I would imagine the Vit D deficiency you 
refer to is b/c in many parts of North America (and other parts of the 
world too) it is dark in winter, cloudy, no sunshine.  I definitely get 
plenty of sunshine in the wintertime.  I thought it was the cold temps 
that affected Raynauds - for me it starts when the nights start to get 
down below freezing (even when our winter days can still be a high if 
7o*F in early winter).  All these theories are interesting.  There's no 
real absolute cause known for Raynauds, is there?  I've done some 
researching but don't recall finding anything that could say for sure.

-- 

Margo T.

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