The Hidden Source of Vitamin C
The prevailing assumption for centuries was that vitamin C could only be obtained from citrus fruits, fresh vegetables, and berries. However, this idea was challenged by the health of Arctic populations. Explorers and scientists noted that Inuit people, who lived in harsh environments where plant cultivation was impossible, rarely suffered from scurvy. The answer lies in their traditional diet, which provided vitamin C from an unexpected source: fresh, raw animal tissues.
Raw Meat and Organ Meats
One of the most critical factors was the consumption of raw or lightly cooked animal products, especially organ meats. Cooking destroys vitamin C, so European explorers who boiled their food lost this vital nutrient, even if they started with fresh meat. In contrast, the Inuit ate many parts of their hunted prey raw or frozen, preserving the vitamin content. Research has confirmed that fresh meat, particularly liver and brain from marine mammals and caribou, contains enough vitamin C to prevent scurvy.
- Seal and caribou livers: These organs are notably rich in vitamin C and were a dietary staple.
- Seal and whale brain: Another source of vitamin C, consumed raw as part of the traditional diet.
- Muscle tissue: While muscle meat contains some vitamin C, the concentrations are much lower than in organs. For example, 100 grams of seal meat has only about 2 mg of vitamin C, compared to higher concentrations in organs and skin.
The Importance of Muktuk
Among the most prized Inuit delicacies is muktuk, the skin and blubber of whales, such as the beluga. Muktuk was a particularly excellent source of vitamin C, often containing 36 mg per 100 grams, a value comparable to orange juice. Its antiscorbutic properties were recognized early in the 20th century.
The Low-Carbohydrate Advantage
Another theory, supported by some nutritional science, posits that the Inuit's low-carbohydrate, high-fat diet may have reduced their bodies' need for vitamin C. Both glucose and vitamin C rely on the same transport protein to enter cells. In a high-carbohydrate diet, glucose can outcompete vitamin C for absorption. With minimal carbohydrate intake, the body's need for vitamin C is lower, and the limited supply is absorbed more efficiently. This means that the relatively modest amounts of vitamin C found in the traditional Inuit diet were more than sufficient.
Traditional Inuit Diet vs. European Sailor's Diet
| Feature | Traditional Inuit Diet | European Sailor's Diet |
|---|---|---|
| Primary Food Source | Fresh and raw animal meat, organs, and fat | Dried, salted, and preserved foods; hard tack; limited fresh produce |
| Vitamin C Content | Present in raw meat, especially muktuk, liver, and brain | Largely non-existent due to lack of fresh food and preservation methods |
| Preparation Method | Often eaten raw, frozen, or lightly boiled, preserving vitamin C | Cooked for long periods, which destroys heat-sensitive vitamin C |
| Organ Consumption | Regular consumption of vitamin-rich organs | Organs often discarded or considered inedible |
| Carbohydrate Intake | Very low, which may increase vitamin C absorption efficiency | High in preserved grains, which can inhibit vitamin C absorption |
| Health Outcome | Historically low rates of scurvy | High rates of scurvy mortality |
How Cultural Practices Protected Against Scurvy
Beyond just eating the right foods, traditional Inuit cultural practices reinforced these nutritional protections:
- Consuming the entire animal: The Inuit showed great respect for their prey, utilizing every part of the animal, including the vitamin-rich organs and skin. European explorers, by contrast, often saw such practices as barbaric and consumed only the muscle meat.
- Freshness and Preservation: Hunting provided a constant supply of fresh food. When stored, meat and fish were often frozen, which preserved the vitamin C content much better than the drying and salting methods used by European sailors.
- Knowledge of the Environment: While less common than animal foods, Inuit also traditionally gathered plants, including berries and specific roots and seaweeds, which supplemented their vitamin C intake. This knowledge was based on centuries of living in the Arctic environment.
Conclusion
The question of why the Eskimos didn't get scurvy highlights a significant blind spot in Western nutritional understanding for centuries. The traditional Inuit diet, rich in fresh, raw animal organs, skin, and blubber, contained sufficient levels of vitamin C to prevent the disease. Combined with the preservation of vitamins through minimal cooking and potentially higher absorption efficiency due to a low-carbohydrate diet, the Inuit effectively protected themselves from a disease that plagued and killed millions of European sailors. The Inuit's deep knowledge of their ecosystem and respect for every part of the hunted animal proved to be their key to nutritional health in the harsh Arctic climate. For a deeper dive into the history of this disease and its connection to exploration, see the World Health Organization's report on scurvy in emergencies.