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Zinc and the Special Senses

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▸Requests for reprints should be addressed to Robert M. Russell, M.D.; Human Nutrition Research Center on Aging, Tufts University, 711 Washington Street; Boston, MA 02111.

Boston, Massachusetts; Baltimore, Maryland; and Guatemala City, Guatemala

© 1983 American College of PhysiciansAmerican College of Physicians

Ann Intern Med. 1983;99(2):227-239. doi:10.7326/0003-4819-99-2-227
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There is evidence that zinc is important for maintenance of the special senses: vision, taste, and smell. Rod function is impaired in zinc deficiency due partly to its role in vitamin A metabolism. However, optic nerve function may also be affected by zinc status. Microophthalmia, anophthalmia, and optic nerve abnormalities have all been found in the offspring of female rats fed zinc-deficient diets. Zinc deficiency clearly decreases taste acuity in both animals and humans. However, other nutritional and non-nutritional conditions also produce hypogeusia. There is limited evidence that zinc deficiency impairs olfactory acuity in humans. New approaches to the assessment of taste and smell abnormalities may provide reliable and reproducible associations between zinc deficiency and taste and smell defects.







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