Paleo Diet and Paleolithic Diet Questions & Answers

Question

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I moved to Boulder a few weeks ago, and we're right on the 40th parallel. I've read that for 40-degree latitudes there's a "Vitamin D Winter" from November through February (a time where the sun doesn't rise high enough in the sky for us to synthesize D in the skin). However, people I've met say it's possible to get a sunburn even in the middle of winter just walking around the city, apparently due to the altitude (5500' above sea level). If you can get a sunburn, wouldn't it stand to reason that you could make Vitamin D? I've read that there's more UVB/Vitamin D production at higher altitudes, so I'm wondering:

Can being at a higher altitude extend Vitamin D production through the winter?

flag	asked Oct 25 2011 at 16:59 Dan 1,705●3●16

Beth-WeightMaven · Answer 1 · 2011-10-25 17:25:34Z UTC

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Altitude does affect vitamin D production. Here's a calculator you can use to geek out on the details! http://nadir.nilu.no/~olaeng/fastrt/VitD_quartMED.html

answered Oct 25 2011 at 17:25

Beth-WeightMaven
15.3k●1●11●55

Darn! Couldn't get it to work! – Dragonfly Oct 25 2011 at 20:08

This link worked: zardoz.nilu.no/~olaeng/fastrt/… – Dragonfly Oct 25 2011 at 20:24

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Thanks ... sorry 'bout that! – Beth-WeightMaven Oct 25 2011 at 22:14

Altitude & Vitamin D Winter

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