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DESCRIPTION: Should the vitamin D levels found in lifeguards be considered the norm for our species given the fact that we evolved running around naked all day in equatorial Africa? Have a question about this video? Leave it in the comment section at and I’ll try to answer it! Please feel free to post any ask-the-doctor type questions here in the comments section and I’d be happy to try to answer them. This is the second video in a nine day series on vitamin D ( Be sure to check out yesterday’s video-of-the-day Vitamin D recommendations changed (
Image Credit: US National Library of Medicine and daryl_mitchell / Flickr.
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