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Vitamin D metabolism and northern native peoples

Early winter afternoon in Tromso, Norway (source). There is little or no solar UV for vitamin D synthesis at high northern latitudes, and humans have had to adapt accordingly. I’ve published another article on vitamin D metabolism and northern Native peoples. It’s actually a reply to a letter criticizing my initial article. A few extracts: We know that natural selection can alter the way the human body synthesises, transports and uses this vitamin.
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