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#1936: Vitamin D, salmon, wildfires, and sheep that
eat dirt

The Tanana River valley near Fairbanks. Photo by Ned Rozell.Sometimes, columns I write spur a few return notes. Here’s some recent correspondence from the in-box:

  • Following a column about her thesis on vitamin D production among sun-starved Fairbanks residents, Meredith Tallas of Oakland, Calif. showed me a recent study on vitamin D in which the researchers concluded that wild salmon contain more of the healthful substance than farmed salmon.

“We recently conducted a study and observed that wild-caught salmon had on average 500–1000 IU vitamin D in 100 g (3.5 ounces), whereas farmed salmon contained 100–250 IU vitamin D per 100-g serving,” wrote Michael Holick of Boston University School of Medicine in the April 2008 American Journal of Clinical Nutrition. “The most likely reason is that vitamin D is plentiful in the food chain but is not plentiful in the pelleted diet fed to farmed salmon.”...(more)


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Recent Articles

Vitamin D, salmon, wildfires, and sheep that eat dirt; Ned Rozell. #1936; 12/03/08

The price of oil and poor air quality; Ned Rozell. #1935; 11/25/08

Alaskans' vitamin D production slows to a halt; Ned Rozell. #1934; 11/19/08

The measure of the north's great mountains; Ned Rozell. #1933; 11/12/08

See you in Saskatchewan, said the swan; Ned Rozell. #1932; 11/04/08

Why do snowshoe hares eat dirt?; Ned Rozell. #1931; 10/29/08

When the Civil War came to Alaska; Ned Rozell. #1930; 10/21/08

Free fish become data for college degree; Ned Rozell. #1929; 10/15/08

Where are the Alaska bats right now?; Ned Rozell. #1928; 10/8/08

Ancient whalers leave their mark on the north; Ned Rozell. #1927; 10/1/08

Northern lab featured studies of the cold and quirky; Ned Rozell. #1926; 9/24/08

Alaska fare from a northern science conference; Ned Rozell. #1925; 9/17/08

Volcanologists step on familiar but different ground; Ned Rozell. #1924; 9/10/08

Whither the ice worms? Team offers bounty; Ned Rozell. #1923; 9/3/08

Whither the ice worms? Team offers bounty; Ned Rozell. #1923; 9/3/08

Should birds stay, or should they go?; Ned Rozell. #1922; 8/27/08

Rat Island may be due for a name change; Ned Rozell. #1921; 8/20/08

Tiny Aleutian island has big impact; Ned Rozell. #1920; 8/13/08

Mortgage is paid on flood control project; Ned Rozell. #1919; 8/6/08

A search for the coldest ice worm; Ned Rozell. #1918; 7/30/08

Unhealthy fats arrive with other changes in Native culture; Ned Rozell. #1917; 7/23/08