Photo by Ned Rozell
Alaska's low sun angle most of the year — here at the extreme in Fairbanks on winter solstice — means our skin doesn't have much chance to convert sunlight to vitamin D3.
Photo by Ned Rozell
Alaska's low sun angle most of the year — here at the extreme in Fairbanks on winter solstice — means our skin doesn't have much chance to convert sunlight to vitamin D3.