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SCURVY. A corruption of the earlier word "scorby," scurvy is the name given to the disease that is the consequence of a prolonged deprivation of vitamin C. The minimum daily requirement to prevent the disease is approximately 7 mg, but it takes several weeks of depletion of body reserves before the problem becomes evident. There are many descriptions of the disease as it appeared among sailors engaged in the long voyages that began to be undertaken from the end of the fifteenth century. After ten or more weeks at sea, men began to experience general pain and stiffness, while their lower body became covered with large purple spots. In addition their gums would swell and grow over their teeth, which became loose; and old wounds would reopen. Finally, sufferers would die suddenly, "in the middle of a sentence," to the astonishment of their mates. This is now explained as the consequence of impaired protein synthesis, with connective tissues weakening, so that the wall of a major artery would finally burst. It soon was discovered that the disease could be prevented, and even cured, by sailors consuming fresh fruit and vegetables. Long sea voyages were only indirectly responsible, by preventing crews from living on anything but foods that could be stored for long periods, like salt meat, dried peas, and flour that could be cooked into bread and puddings. The same disease appeared on land when fresh food was unavailable for long periods, as in the California gold rush, for example. The first "antiscorbutic" (i.e., antiscurvy) foods to be prized by sailors were oranges and lemons, but they would become moldy on long voyages, and juices preserved with brandy or rum were more stable alternatives that also proved to be more palatable. Sailors in the British navy were required, from early in the nineteenth century, to take a portion of lime juice in their daily ration of rum; men from other navies called them "limeys" as a term of abuse, implying that "real men" did not need to drink fruit juice. Another tradition among sailors on long whaling expeditions was to take a large store of potatoes. These are not very rich in the vitamin but contain enough to prevent the disease if one is eaten freshly cooked every day.

In the early twenty-first century the disease still appears occasionally in adults, typically as "widowers' scurvy," among men who have never learned to cook and, when left to fend for themselves, subsist on things like breakfast cereals and sandwiches made from bread and cheese or ham. It also has appeared in people living on very restricted "fad" diets, such as a Zen macrobiotic diet of brown rice sprinkled with sesame seeds.

With the recognition of the importance of bacteria in causing diseases, at the end of the nineteenth century, it became a practice in some cities to sterilize cows' milk by autoclaving it. Children's deaths from "summer diarrhea" were reduced greatly as a result of this practice. However, this processing also resulted in the destruction of most of the vitamin C in the milk and, when it was fed to infants with only a cereal supplement, scurvy became a common problem. The addition of orange juice to the infants' diets provided a simple solution. With modern technology, milk can be freed from pathogens and potatoes can be dried under milder conditions, so that vitamin C is preserved; alternatively, the synthetic vitamin can be added to restore vitamin C levels in foods.

See also Beriberi; Niacin Deficiency (Pellagra); Nutrient Bioavailability; Nutrients; Nutrition; Vitamin C; Vitamins.

Kenneth John Carpenter