Vitamin C in the Traditional Inuit Diet: Lessons from a 1979 Seal Hunting Camp Study

Table of Contents

• Key Points
• Background: The Historical Debate About Inuit Nutrition
• Earlier Studies: Concerns About Vitamin C Deficiency
• Study Methods: How the Research Was Conducted
• Daily Eating Patterns at the Hunting Camp
• Key Findings: Vitamin C Content of Traditional Foods
• Estimating Daily Vitamin C Intake
• Muktuk and Other Special Foods
• Winter Diet Considerations
• Clinical Implications: What This Means for Health
• Study Limitations
• Recommendations for Patients and Researchers
• Frequently Asked Questions
• Source Information

Key Points

• In a 1979 study of 3 Inuit families, traditional summer diets supplied at least 11–118 mg vitamin C daily.
• Average estimated intake was at least 30 mg per day, meeting the 1975 Canadian adult allowance.
• Muktuk (38 mg/100g), mountain sorrel (36 mg/100g), and ringed seal liver (35 mg/100g) were rich vitamin C sources.
• Drinking broth recovered up to 35% of vitamin C lost during boiling, making cooking method nutritionally important.
• In larger Inuit villages, 50–80% of adults were high-risk for deficiency, linked to loss of access to traditional foods.

Background: The Historical Debate About Inuit Nutrition

Early Arctic explorers quickly learned an important lesson: adopting the traditional Inuit diet of raw or boiled fish and meat, supplemented with occasional ground plants and berries, was essential for survival in the far north. Explorer Fridtjof Nansen recognized this as early as 1897. Those who could not or would not adapt to this way of eating frequently fell victim to malnutrition.

Scurvy — a disease caused by a deficiency of vitamin C (ascorbic acid) — was first observed in the Arctic among white explorers and trappers who persistently ate "southern" foods instead of native fare. Its symptoms include fatigue, weakened blood vessels, bleeding gums, and poor wound healing. Ironically, the arrival of southern white culture in northern communities led to the gradual adoption of processed foods by Inuit families.

This dietary shift, combined with the consolidation of small hunting communities into larger villages where access to native foods was often limited, resulted in a steady decline in nutritional status among Inuit populations. Dr. H. Draper documented this trend in 1977, noting the health consequences of moving away from traditional food sources.

Earlier Studies: Concerns About Vitamin C Deficiency

Previous research had raised serious concerns about vitamin C levels in Inuit communities. A 1940 study by Dr. V. E. Levine found subacute scurvy (a milder form of the disease) in 28 out of 30 Eskimo children examined in Point Barrow, Alaska. The problem was attributed to the absence of fresh meat — only reindeer killed several months before was available to the community.

A 1947 study by the Alaska Department of Health showed that ascorbic acid was consistently lacking in native diets. Of 117 plasma ascorbic acid determinations (blood tests measuring vitamin C levels):

• 96 were rated poor (82% of samples)
• 16 were rated fair (14% of samples)
• Only 5 were within a normal range (4% of samples)

A more recent Nutrition Canada survey examined four major Inuit settlements in the Northwest Territories — Eskimo Point, Pelly Bay, Frobisher Bay, and Coppermine. That survey reported that vitamin C intake was adequate only in children under five years of age, and clearly low in women over 54 years of age. Between 50 and 80 percent of adults in these communities were placed in high-risk categories for vitamin C deficiency.

However, the researchers noted an important gap: small hunting settlements were necessarily overlooked in the Canada-wide nutritional survey. Unlike the larger settlements, these small communities had retained much of the traditional culture and healthful lifestyle that early explorers had recognized. This study was undertaken as part of a larger investigation into vitamin C in the Arctic food chain, with the goal of determining whether the summer diet of three Inuit families from Holman — a hunting community of approximately 250 people — provided adequate vitamin C. Though commercially prepared foods were available and used, a large variety of native foods formed the bulk of their diet.

Study Methods: How the Research Was Conducted

Information on the diet of the three Inuit families was gathered by one of the researchers (Thomas G. Smith) while living at Kutuervik, a seal hunting camp located 30 miles southeast of Holman, Northwest Territories. The study took place during July through September 1975, covering a six-week period beginning July 10.

Detailed records were maintained on the types of foods consumed, how frequently they were eaten, and the approximate quantities consumed by family members. Small samples of each raw food item were collected and frozen, usually within 2 hours of acquisition, in an electric freezer at a field laboratory. The frozen samples were then shipped to the University of Guelph in Ontario, where they were maintained at -70°C (well below standard freezer temperatures) for 2 months until analysis.

In the laboratory, each food item was analyzed in duplicate for total ascorbic acid using the established method of Roe and Kuether (1943). To understand the effects of cooking, sub-samples of each food item were boiled for 10 minutes and then re-analyzed, roughly simulating the simple method of cooking used at the camp.

Daily Eating Patterns at the Hunting Camp

The most common meat item in the hunting camp was caribou. Ringed seal was the most abundant marine mammal in the area, yet it was not consumed nearly as often as the less common but preferred bearded seal, known in Inuktitut as "ugyuk." The flesh of both seal species, caribou, and muskox was eaten either fresh-boiled or dried by draping thinly sliced pieces over rocks or driftwood frames.

Typically, the daily feeding pattern consisted of four meals:

1. First three meals: Generally 200-250 g portions of dried meats known as "mipko," or of dried Arctic char called "beefy." These were eaten with tea and bannock, a form of bread made with refined flour.
2. Fourth and largest meal: Usually a stew made with flesh, bones, marrow, and selected viscera (internal organs) of terrestrial and marine mammals and birds. Adult males typically consumed 500-600 g portions, with females eating somewhat less and children proportionally less. The broth was always consumed as part of the meal — a detail that proved nutritionally significant.

Few plants were available in the vicinity of Kutuervik; they formed only an incidental part of the diet.

Key Findings: Vitamin C Content of Traditional Foods

The following table shows the vitamin C content of the raw and boiled food items eaten during the six-week study period. All values are expressed in mg per 100 g (approximately 3.5 ounces) of food, and represent the mean of duplicate determinations on one sample of each food item.

Mammals

• Ringed seal (Phoca hispida): flesh — 3 mg/100g raw, 2.5 mg/100g boiled; liver — 35 mg/100g raw, 13.6 mg/100g boiled
• Bearded seal (Erignathus barbatus): flesh — 1 mg/100g raw, 0.9 mg/100g boiled; intestine — 1 mg/100g raw, 0.9 mg/100g boiled
• Beluga whale (Delphinapterus leucas) — "muktuk": epidermis (outer skin layer) — 38 mg/100g raw; dermis (inner skin layer) — 3 mg/100g raw; blubber — 5 mg/100g raw
• Polar bear (Ursus maritimus): flesh — 1 mg/100g raw, 0.8 mg/100g boiled
• Muskox (Ovibos moschatus): fresh flesh — 1.5 mg/100g raw, 0.5 mg/100g boiled; dried flesh — 1 mg/100g
• Caribou (Rangifer tarandus): flesh — 1.4 mg/100g raw, 0.9 mg/100g boiled; fat — 1.8 mg/100g raw, 0.3 mg/100g boiled
• Arctic hare (Lepus arcticus): 1.3 mg/100g raw, 0.8 mg/100g boiled

Birds

• Arctic loon (Cavia arctica): flesh — 2 mg/100g raw, 0.9 mg/100g boiled
• Ptarmigan (Lagopus mutus): flesh — 1.2 mg/100g raw, 0.5 mg/100g boiled
• King eider (Somateria spectabilis): flesh — 1.6 mg/100g raw, 0.3 mg/100g boiled

Fish

• Arctic char (Salvelinus alpinus): whole fish — 5.8 mg/100g raw, 0.8 mg/100g boiled; dried flesh — 1.8 mg/100g

Plants

• "Maw" or licorice root (Hedysarum alpinum): 21 mg/100g raw, 4.5 mg/100g boiled
• Mountain sorrel (Oxyria digyna): 36 mg/100g raw, 5.3 mg/100g boiled

The researchers noted that some vitamin degradation may have occurred in the interval between sampling and analysis, meaning the values reflect the minimum vitamin C content at the time of eating. Nevertheless, the values were equivalent to or higher than those reported for the same or similar food items by Høygaard and Rasmussen in 1939.

Estimating Daily Vitamin C Intake

Using the food consumption records and the laboratory analysis, the researchers calculated daily vitamin C intake for adults in the camp.

The three minor meals of dried meat or fish, totaling approximately 700 g for the average adult male, provided at least 7 mg (when eating muskox) to 13 mg (when eating char) of vitamin C per day. The 500 g main meal of boiled meat provided an additional minimum of 1 mg (when eating king eider) to 68 mg (when eating ringed seal liver) of the vitamin.

An important finding relates to cooking methods. According to Høygaard's 1941 research, 35 percent of the vitamin C leached from boiling bird and seal flesh is recoverable in the stock (broth). Because the Kutuervik families always consumed the broth as part of the meal, this would have provided an additional 2 to 37 mg of the vitamin per day.

Muktuk and Other Special Foods

Certain foods that are not abundant but are eaten when available can substantially augment vitamin C intake. This is particularly true of licorice root, mountain sorrel, and muktuk.

Muktuk is undoubtedly the most prized delicacy in the Inuit diet. It consists of the skin of the beluga whale, with about 2-4 cm of attached blubber. The thin epidermis (outer skin layer) contains an impressive 38 mg/100 g of vitamin C, making it one of the richest sources of the vitamin in the Inuit diet. Its antiscorbutic (anti-scurvy) properties were first recognized early in the 20th century by Bertelsen in 1911.

During the study period, muktuk was consumed for seven days, at an adult average of 1 kg per day, thus providing a variably high quantity of vitamin C, depending on the proportion of skin and blubber in each serving.

Based on all these figures, the researchers estimated that adult daily intake of vitamin C varied between at least 11 and 118 mg during the summer period, with as much as 50 to 100 mg extra when such sources as muktuk were available. Women and children consumed proportionally less of the vitamin due to smaller portion sizes.

Winter Diet Considerations

Though the winter diet was not analyzed in this study, the researchers provided valuable context. The winter diet of the Holman Inuit consists primarily of animal flesh and fat, particularly raw-frozen Arctic char and caribou, and stews containing fresh and thawed viscera (internal organs) and meat. This differs from the summer diet principally in that two major meals are consumed rather than one.

Extrapolating from the findings on summer foods, eating habits, and the availability of fresh meats, the authors suggested that vitamin C in winter is at least as plentiful as during the summer months.

Clinical Implications: What This Means for Health

These findings carry several important messages for understanding nutrition and health:

• Traditional diets can be nutritionally complete. Despite the absence of citrus fruits and vegetables, the traditional Inuit diet provided adequate vitamin C through fresh meat, organs, fish skin, and occasional plant foods.
• Organ meats are nutritional powerhouses. Ringed seal liver contained 35 mg/100g of vitamin C — comparable to many fruits and vegetables. This demonstrates the nutritional value of consuming organ meats, which are often discarded in modern diets.
• Cooking methods matter. The practice of consuming broth conserved the vitamin C that leached out of meat during boiling, capturing up to 35% of the vitamin content. This traditional practice was nutritionally significant.
• Comparing intake to official guidelines. The estimated mean intake of at least 30 mg per day met the adult daily allowance established by the Canada Department of National Health and Welfare (as published in 1975). This was well above the 10 mg minimum dose found to prevent and cure scurvy in adult males by Bartley and colleagues in 1953. On a practical note, Høygaard found that only 15 mg of vitamin C per day was adequate to prevent scurvy on long sledging journeys in the Arctic.
• Nutritional decline in transitional communities. The contrast between this hunting camp and the larger transitional-culture villages is striking. In the larger settlements, 50-80% of adults were placed in high-risk categories for vitamin C deficiency. This suggests that loss of access to traditional foods — rather than any inherent deficiency in the traditional diet itself — was the primary driver of nutritional problems.

The Holman Inuit seemed to enjoy a healthy and robust way of life, and the authors doubted that vitamin C deficiency presented a problem for them, at least not to the extent reported in the larger transitional culture settlements, where native foods were either unavailable or not utilized.

Study Limitations

Like all research, this study had important limitations that should be considered when interpreting the findings:

• Small sample size: Only three Inuit families participated in the study, which limits how broadly the findings can be generalized to other communities or seasons.
• Single samples: Each food item was analyzed from one sample, with duplicate determinations on that single sample. Foods can vary naturally in nutrient content, so this provides a snapshot rather than a complete picture.
• Possible vitamin degradation: Some vitamin C degradation may have occurred between sampling and analysis, even though samples were frozen quickly. This means the reported values may underestimate the actual vitamin C content at the time of eating.
• Summer-only focus for analysis: The winter diet was not directly analyzed; the conclusion that winter vitamin C was adequate was based on extrapolation from summer findings and knowledge of winter eating habits.
• Timing of study: The research was conducted in 1975 and published in 1979. Dietary patterns and food availability may have changed since that time.

Recommendations for Patients and Researchers

While this study is now several decades old, its lessons remain relevant for both patients and healthcare providers:

1. For Inuit communities: Traditional foods — including organ meats, fish skin (muktuk), and wild plants — are valuable sources of essential nutrients. Efforts to maintain access to traditional hunting and gathering practices support nutritional health.
2. For healthcare providers: When assessing the nutritional status of Indigenous patients, consider that traditional diets may provide adequate vitamins even when they look very different from standard dietary guidelines. Don't assume deficiency based solely on the absence of typical vitamin C sources like citrus fruits.
3. For anyone concerned about vitamin C: The study highlights that vitamin C appears in many unexpected foods. Organ meats, fish skin, and fresh meat all contributed meaningfully to vitamin C intake in this population.
4. For public health policy: The contrast between the hunting camp and the larger settlements suggests that supporting access to traditional foods may be more effective for improving nutrition than simply promoting processed "southern" foods.

Frequently Asked Questions

How much vitamin C did Inuit families get from a traditional diet?

In a 1979 study of three Inuit families at a summer seal hunting camp, daily vitamin C intake ranged from at least 11 mg to 118 mg per adult. On average, the estimated intake was at least 30 mg per day, which met the adult allowance recommended at that time. (51 words)

Did cooking destroy the vitamin C in traditional Inuit meals?

Boiling did reduce vitamin C content in many foods. For example, ringed seal liver dropped from 35 mg to 13.6 mg per 100 grams after boiling. However, families always drank the broth, which recovered up to 35 percent of the vitamin C that leached out during cooking. (52 words)

Why did larger Inuit villages have more vitamin C deficiency?

In larger transitional villages, 50 to 80 percent of adults were considered high risk for vitamin C deficiency, according to earlier surveys. The researchers believed this was due to reduced access to traditional native foods, not because traditional diets lacked vitamin C. Small hunting camps like the one studied had retained their traditional diet. (56 words)

What does this study tell us about organ meats and fish skin?

Organ meats and fish skin are notable sources of vitamin C. Ringed seal liver contained 35 mg per 100 grams, comparable to many fruits and vegetables. Muktuk, or whale skin, had 38 mg per 100 grams. These traditional foods were important contributors to meeting daily vitamin C needs. (53 words)

What are the limitations of this research on Inuit vitamin C intake?

The study included only three Inuit families, and each food item was analyzed from a single sample. Vitamin C may have degraded slightly during storage, so reported values may be underestimates. Also, the winter diet was not directly analyzed. These factors limit how broadly the findings can be applied. (51 words)

When should someone who eats a traditional Inuit diet seek a second opinion about being told they need vitamin C supplements?

Traditional Inuit foods have been measured to provide roughly 11 to 118 mg of vitamin C per day in a hunting-camp setting, averaging at least 30 mg, which met Canada’s adult allowance at that time. Sources such as ringed seal liver (35 mg/100 g) and whale skin (muktuk, 38 mg/100 g) are rich in the vitamin. If you or your doctor assume such a diet is deficient because it lacks citrus fruits, or if a recommendation ignores native foods, an independent second opinion can clarify whether supplements are actually needed. Diagnostic Detectives Network provides independent expert second opinions.

Source Information

This patient-friendly article is based on the following peer-reviewed research:

Original Title: "Vitamin C in the Diet of Inuit Hunters From Holman, Northwest Territories"

Authors: Joseph R. Geraci (Department of Pathology, University of Guelph, Guelph, Ontario) and Thomas G. Smith (Department of Fisheries and the Environment, Fisheries and Marine Service, Arctic Biological Station, Ste. Anne de Bellevue, P.Q.)

Journal: Arctic, Volume 32, No. 2 (June 1979), pages 135-139

Funding/Support: The authors acknowledged the cooperation of the Inuit of Holman, especially Jimmy Memogana and his family, as well as technical assistance from Mrs. Anne De Freitas and valuable manuscript comments from Drs. H. Draper and E. Evans of the Department of Nutrition, University of Guelph.

This patient-friendly article is based on peer-reviewed research and is intended for educational purposes only. It should not replace professional medical advice.