The following website and video provides very useful information to help determine if Vitamin D can be produced from sun exposure based on your geographic location and the sun's angle.
The website is http://aa.usno.navy.mil/data/docs/AltAz.php and in the table the altitude needs to be about 50 degrees.
Permalink Reply by Nate on HW, do you mean something like tan through clothing?
http://www.tanthrough.com/index.htm
Permalink Reply by Rayla Sun Gazer on OMG Nate ! How cool is that ?? Thanks for posting that site !
Permalink Reply by Chris Califano on Great, Nate! Thanks for posting.
Permalink Reply by Rock on 
Permalink Reply by Greenmama on All fruits and vegetables have antioxidants that help combat cellular damage from things like sun exposure. The darker the colors, the more the antioxidants. So it's not just tomatoes, it's all fruits and veggies! Lucky us. :) Eat the rainbow.
Permalink Reply by Sweetfruitlover on Thanks Nate!
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