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Zinc status and taste acuity in older Europeans: the ZENITH study

Stewart-Knox, B, Simpson, EEA, Parr, H, Rae, G, Polito, A, Intorre, F, Meunier, N, Andriollo-Sanchez, M, O'Connor, JM, Coudray, C and Strain, JJ (2005) Zinc status and taste acuity in older Europeans: the ZENITH study. European Journal of Clinical Nutrition, 59 (Suppl.). S31-S36. [Journal article]

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DOI: 10.1038/sj.ejcn.1602295


Background: Age-related decline in taste acuity may be both a cause and an effect of depleted zinc and/or increased zinc requirement. Objective: The aim of this study was to explore associations between zinc status and taste acuity in healthy older European adults aged 55-90 y. Sample: Volunteers were recruited within Italy (n = 108 aged 70-90 y), the United Kingdom (UK) (n = 93 aged 55-70) and two regions of France (n = 186), Grenoble (aged 70-90 y) and Clermont-Ferrand (aged 55-70 y). Methods: A signal detection theory approach was adopted, employing a three-alternative, forced-choice procedure. The data were converted to R-indices and bivariate correlations were computed to explore relationships between serum zinc, erythrocyte zinc and taste acuity. ANOVA was undertaken to determine regional differences in zinc status. Results: Higher erythrocyte zinc status was associated with better acuity for salt (sodium chloride) taste in the sample as a whole (P = 0.012) (n = 385). Higher serum zinc levels were associated with greater sensitivity to sour taste (citric acid) (P = 0.015) only in the older groups (aged 70-90 y). There were no apparent associations between serum or erythrocyte zinc status and acuity for bitter (quinine) or sweet (sucrose) tastes irrespective of age. Conclusion: These results agree with those previously suggesting that age-related detriment in sensitivity for salt taste may be associated with depleted zinc.

Item Type:Journal article
Faculties and Schools:Faculty of Life and Health Sciences > School of Biomedical Sciences
Faculty of Life and Health Sciences
Faculty of Life and Health Sciences > School of Psychology
Research Institutes and Groups:Biomedical Sciences Research Institute > Nutrition Innovation Centre for Food and Health (NICHE)
Biomedical Sciences Research Institute
Psychology Research Institute > Population Health Sciences and Mental Health Services
Psychology Research Institute > Health, Education and Well-being
Psychology Research Institute
ID Code:7181
Deposited By: Professor Jacqueline McCormack
Deposited On:18 Jan 2010 11:33
Last Modified:15 Dec 2011 16:04

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