Serum concentrations of zinc and selenium in elderly people: results in healthy nonagenarians/ centenarians L. Savarino a, * , D. Granchi a , G. Ciapetti a , E. Cenni a , G. Ravaglia b , P. Forti b , F. Maioli b , R. Mattioli c a Laboratorio di Fisiopatologia degli Impianti Ortopedici, Istituti Ortopedici Rizzoli, Via di Barbiano 1/10, 40136 Bologna, Italy b Institute of Medical Pathology I, St. Orsola Hospital, Bologna, Italy c Azienda USL Bologna Nord, S.Giorgio di Piano, Bologna, Italy Received 1 August 2000; received in revised form 13 October 2000; accepted 2 November 2000 Abstract Trace elements such as zinc (Zn) and selenium (Se) play an important role in maintaining the metabolic homeostasis in elderly people and the risk of de®ciency seems to increase in proportion to the age. Zn and Se concentrations, as indices of the micronutrient status in healthy subjects over 90 years, are scarcely analyzed and could represent a model for studying the physiology of successful aging. Our aim was to investigate Zn and Se concentrations in the healthy persons over the age of 90 years. One hundred and ®fty two subjects volunteered for the study. They were divided into two groups: 90 non-institutionalized nonagenarians/centenarians (91±110 years) (group A) and 62 elderly subjects (60±90 years) used for comparison (group B). Serum concentrations of Zn and Se were determined, respectively, by ¯ame atomic absorption spectrophotometry (FAAS) and elec- trothermal atomic absorption spectrophotometry (ETAAS). The effect of age and sex on ion concen- trations was investigated. Mean values ^ standard deviation of Zn and Se concentrations in the group A were 11.97 ^ 2.00 and 0.87 ^ 0.28 mmol/l, respectively. A signi®cant decrease of Se and Zn values was demonstrated in group A, when compared with group B, in both males and females. However, 84.4% of the `healthy' nonagenarians/centerians had both Zn and Se concentra- tions equal to or greater than the lowest values of the elderly group and only 3.3% of cases showed both Zn and Se de®ciencies. Consequently, a prospective and follow-up evaluation of Zn and Se could be proposed as a good index for a correct monitoring of the micronutrient de®ciencies, that could represent an early sign of disease. q 2001 Elsevier Science Inc. All rights reserved. Keywords: Zinc; Selenium; Aging; Nonagenarians; Centerians; Antioxidant L. Savarino et al. / Experimental Gerontology 36 (2001) 327±339 327 Experimental Gerontology 36 (2001) 327±339 www.elsevier.nl/locate/expgero 0531-5565/01/$ - see front matter q 2001 Elsevier Science Inc. All rights reserved. PII: S0531-5565(00)00218-7 * Corresponding author. Tel.: 139-51-636-6897; fax: 139-51-636-6748. E-mail address: lucia.savarino@ior.it (L. Savarino).