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The Inuit Paradox | Health & Medicine | DISCOVER Magazine

The Inuit Paradox | Health & Medicine | DISCOVER Magazine

No one, not even residents of the northernmost villages on Earth, eats an entirely traditional northern diet anymore. Even the groups we came to know as Eskimo—which include the Inupiat and the Yupiks of Alaska, the Canadian Inuit and Inuvialuit, Inuit Greenlanders, and the Siberian Yupiks—have probably seen more changes in their diet in a lifetime than their ancestors did over thousands of years. The closer people live to towns and the more access they have to stores and cash-paying jobs, the more likely they are to have westernized their eating. And with westernization, at least on the North American continent, comes processed foods and cheap carbohydrates—Crisco, Tang, soda, cookies, chips, pizza, fries. “The young and urbanized,” says Harriet Kuhnlein, director of the Centre for Indigenous Peoples’ Nutrition and Environment at McGill University in Montreal, “are increasingly into fast food.” So much so that type 2 diabetes, obesity, and other diseases of Western civilization are becoming causes for concern there too.

Today, when diet books top the best-seller list and nobody seems sure of what to eat to stay healthy, it’s surprising to learn how well the Eskimo did on a high-protein, high-fat diet. Shaped by glacial temperatures, stark landscapes, and protracted winters, the traditional Eskimo diet had little in the way of plant food, no agricultural or dairy products, and was unusually low in carbohydrates. Mostly people subsisted on what they hunted and fished. Inland dwellers took advantage of caribou feeding on tundra mosses, lichens, and plants too tough for humans to stomach (though predigested vegetation in the animals’ paunches became dinner as well). Coastal people exploited the sea. The main nutritional challenge was avoiding starvation in late winter if primary meat sources became too scarce or lean.

These foods hardly make up the “balanced” diet most of us grew up with, and they look nothing like the mix of grains, fruits, vegetables, meat, eggs, and dairy we’re accustomed to seeing in conventional food pyramid diagrams. How could such a diet possibly be adequate? How did people get along on little else but fat and animal protein?

What the diet of the Far North illustrates, says Harold Draper, a biochemist and expert in Eskimo nutrition, is that there are no essential foods—only essential nutrients. And humans can get those nutrients from diverse and eye-opening sources.

One might, for instance, imagine gross vitamin deficiencies arising from a diet with scarcely any fruits and vegetables. What furnishes vitamin A, vital for eyes and bones? We derive much of ours from colorful plant foods, constructing it from pigmented plant precursors called carotenoids (as in carrots). But vitamin A, which is oil soluble, is also plentiful in the oils of cold-water fishes and sea mammals, as well as in the animals’ livers, where fat is processed. These dietary staples also provide vitamin D, another oil-soluble vitamin needed for bones. Those of us living in temperate and tropical climates, on the other hand, usually make vitamin D indirectly by exposing skin to strong sun—hardly an option in the Arctic winter—and by consuming fortified cow’s milk, to which the indigenous northern groups had little access until recent decades and often don’t tolerate all that well.

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