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.
Taking vitamin D and calcium, alone or together, failed to reduce the severity of respiratory tract infections during the winter months, according to a new study. Read Post
A newly published study found prevalence of autism among U.S. children is inversely correlated with solar UVB doses, the primary source of vitamin D. Maternal vitamin D deficiency or vitamin D deficiency in early life could explain ... Read Post