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Scurvy and the Lewis & Clark Expedition

July 2, 2012 by Frances Hunter

18th-century sailors

18th-century sailors: no strangers to scurvy

During the age of exploration and long sea voyages, scurvy was a common malady among men who went for months on an unbalanced, limited diet. Scurvy is a serious disease that occurs when you have a severe lack of vitamin C (ascorbic acid) in your food. The symptoms of scurvy include weakness, fatigue, loose teeth, swollen gums, stinking breath, anemia, skin eruptions and even hemorrhages.

Vitamin C is vital for the health of connective tissues such as collagen, cartilage and bone; it is also critical to the body’s ability to absorb iron for healthy red blood cells. Though Lewis and Clark would not have known about vitamin C and its role in human health, they were certainly aware of the dangers of scurvy, and there is some evidence that they took concrete steps to prevent it during the Expedition.

Jug of vinegar

Vinegar did little to help prevent scurvy

Starting in Revolutionary times, the Continental Army included a daily dose of 4 teaspoons of vinegar in the men’s rations to help prevent scurvy among the troops. It is recorded in the journals  that William Clark obtained “750 rats. [rations] of Soap Candles & vinager” for the Corps of Discovery while at Camp River DuBois in January 1804. Since vinegar is never mentioned again in the journals, it is unknown whether the rations were handed out at Camp River DuBois, taken along on the expedition, or used for some other purpose than scurvy prevention.  In any case, the vinegar would not have helped much. Though cider vinegar is as tangy as lemon juice and would have supplied some of the acid ideally gotten through citrus fruits, it contains no vitamin C and thus would have had little practical effect in preventing scurvy.

A Treatise on the Scurvy by Dr. James Lind, 1753

A Treatise on the Scurvy by Dr. James Lind, 1753

Fortunately for Lewis and Clark, scurvy is not that easy a disease to get. It takes one to three months of complete vitamin C deprivation before the human body begins to show signs of scurvy. For much of the journey, the men were able to find fruits, vegetables, and berries along the trail that would have supplied some much-needed vitamin C. In various entries in the journals, Lewis and Clark mention the men consuming rosehips, plums, chokecherries, serviceberries, and currants. Also, some greens like cattail, lamb’s quarter, and miner’s lettuce are good sources of vitamin C and would have been available at points along the trail.

I did not know (until researching this blog) that some types of meat can also contain vitamin C. Organ meats such as kidneys and liver are sometimes rich in vitamin C, and so are some kinds of fish. So these sources would have also helped supply the much-needed vitamin in the Corps’ diet.

Nevertheless, some scholars believe that Lewis and Clark’s men may have suffered from the beginning stages of scurvy at some points along the expedition.   On May 10, 1805, while traveling through violent winds and sometimes snow in present-day Montana, Lewis wrote:  “Boils and imposthumes have been very common with the party Bratton is now unable to work with one on his hand; soar eyes continue also to be common to all of us in a greater or less degree.” Dr. E. G. Chuinard, author of Only One Man Died: The Medical Aspects of the Lewis & Clark Expedition, suggests that the “boils and imposthumes” may have been an indication of mild scurvy.

Hawthorn berries

Hawthorn berries from the Nez Perce provided desperately needed vitamin C

There can be no doubt that the Corps was badly malnourished when they emerged from the Bitterroot Mountains in September of 1805. Deep snows made the seven-day crossing of the rugged Bitterroot Range a terrible ordeal, and there was no wild game to be found. The Corps was reduced to slaughtering their horses and eating rancid “portable soup” Lewis had purchased back in Philadelphia two years before. During this time, Clark records that skin infections and boils were common among the men, and it would not have been surprising if these were a sign of scurvy. Fortunately, the Corps reached the Nez Perce villages, where the natives supplied hawthorn berries. Later on the Columbia River, they had access to fruits and fish that helped restore the men to health.

Albert Szent-Gyorgyi

Albert Szent-Gyorgi discovered Vitamin C in 1927

While various theories about the treatment of scurvy abounded, the actual cause of the disease remained somewhat poorly understood, and scurvy continued to be a scourge of armies and navies well into the 20th century. It was not until the 1920’s that Hungarian researcher Albert Szent-Gyorgyi isolated a substance known as hexuronic acid, or vitamin C. The connection between the lack of hexuronic acid and scurvy was finally proven in 1932, by American researcher Charles Glen King of the University of Pittsburgh.  Albert Szent-Gyorgyi won the Nobel Prize for his achievement – and renamed his discovery “ascorbic acid” in honor of its antiscorbutic (anti-scurvy) properties.

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Posted in Army life, Corps of Discovery, Food and diet, Frontier medicine, History, Lewis & Clark Expedition |

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