On Fri, 22 Jan 2010 14:28:33 -0600, Don Wiss <[log in to unmask]> wrote:
>
> Robert Kesterson wrote:
>  >I recall reading that it only takes 15 minutes of full body exposure >  
> each day to get "enough" sunlight for vitamin D synthesis, and >  
> proportionately longer as you cover up.
>
> Bull shit. The experts also claim that the RDA for vitamin D is still  
> 200 IU.

I didn't say it was right -- it's not even specific enough to be  
meaningful.  15 minutes in Maine in January is going to get you a lot less  
sunlight than 15 minutes in equatorial Africa in July.

Personally I spend as much time outdoors as I can.  I do have full  
spectrum lighting in every room of the house, but it pales in comparison  
to real sunlight -- if not in spectrum, then in intensity.

--
   Robert Kesterson
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