Dear Mark: Sun Exposure and Glass

November 16, 2010

These days many of us go to work in the dark and leave greeted by the same. Those lucky enough to have windows next to their desks or work stations might think, “Hey, at least I get some sun exposure during the day.” But how does sun exposure through glass compare with direct sunlight? One reader brought up the topic this week.
Dear Mark,
I work in an office and have a big picture window in front of my desk. Don’t get me wrong – I love the light and all, but my friend told me you don’t get any real sunlight benefits (vitamin D, etc.) through glass. Is that right? I’m guessing a tan is out as well. What’s the story on what gets through and what doesn’t? Love the site by the way.

Thanks to reader Rob for this week’s question. Sorry to rain on anyone’s parade here, but the friend […]

Original post by Mark Sisson

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