Seasonal variations in hair zinc concentrations in Canadian and African children

Gibson, Rosalind S.; Ferguson, Elaine; Vanderkooy, Pat; MacDonald, A

doi:10.1016/0048-9697(89)90391-4

Cited by 28 publications

(12 citation statements)

References 15 publications

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“…The large variations in the present study are unlikely to be attributable to the laboratory technique since the precision of the analyses as assessed by the recovery experiments was satisfactory and may be physiological. This study did not address seasonal influences, which may have a marked effect on hair Zn concentrations as described by Gibson et al (1989). Infants in the present study were enrolled over a relatively long period of one year from March 2001 and March 2002, which arguably has levelled out seasonal variations.…”

Section: Discussionmentioning

confidence: 95%

“…Biochemical indices of Zn status, such as serum and erythrocyte Zn, or tests of immune competence were not attempted. Gibson et al (1989) have proposed the cut-off value of hair Zn levels below 110 mg/g (1•68 mmol/g) as an indicator of sub-optimal Zn status. Scalp hair was collected at baseline (6 months of age) and at the end of the trial (12 months of age) and analysed for Zn content.…”

Section: Zinc Analysismentioning

confidence: 99%

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Processing of complementary food does not increase hair zinc levels and growth of infants in Kilosa district, rural Tanzania

et al. 2006

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A community-based, randomized, placebo-controlled, double-blind trial was conducted from March 2001 to March 2002 in Kilosa, a rural district of Morogoro Region in Tanzania. One hundred and fifty-eight infants were selected randomly from lists of local Maternal and Child Health Care Centres and received either processed complementary food (PCF) or unprocessed complementary food (UPCF) from age 6 to 12 months. Processing increased Zn solubility and energy density of the porridge prepared from the complementary food (CF) as determined in vitro. Phytate:Zn molar ratio of the PCF and UPCF was 25.8 and 47.5, respectively. Under the study conditions, the processing of CF did not improve Zn status as measured by hair analysis. No significant correlations were found between hair Zn values and anthropometric measurements. Our findings suggest that processing alone of cereal-based CF may be insufficient to ensure an adequate supply of Zn to improve growth and Zn status of infants. Dietary modification to tackle Zn deficiencies in similar target groups may therefore only be successful when other Zn-rich foods such as meat and fish are included

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Section: Discussionmentioning

confidence: 95%

Section: Zinc Analysismentioning

confidence: 99%

Processing of complementary food does not increase hair zinc levels and growth of infants in Kilosa district, rural Tanzania

et al. 2006

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“… a Hair zinc of 110 μg/g (1.68 μmol/g) is the accepted cutoff for seasons with shortest daylight (Gibson et al, 1989). …”

Section: Figurementioning

confidence: 99%

Hair cortisol reflects socio-economic factors and hair zinc in preschoolers

Vaghri

Guhn

Weinberg

et al. 2013

Psychoneuroendocrinology

100

111

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“…Renewed interest in the analysis of mummified remains, fueled by technological innovations and interdisciplinary collaborations, has made studies of hair a more viable research topic Katzenberg and Sanford, 1993;White, 1993). Of particular interest are research efforts in which hair has been used to assess nutritional deficiencies (Reinhold et al, 1966;Hambidge et al, 1972;Yang, 1985), overall nutritional status within populations (Ross et al, 1986;Gibson et al, 1989Gibson et al, , 1991, and specific diseases (Mazzotta et al, 1986;Oluwole et al, 1990). In a related vein, hair analysis is also being used to evaluate the nutritional and physiological status of women prior to conception (Barlow et al, 1985) and during pregnancy and lactation (see Valkovic, 1988).…”

mentioning

confidence: 97%

Multivariate analyses of elemental hair concentrations from a medieval Nubian population

Sandford

Kissling

1994

American J Phys Anthropol

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Elemental hair concentrations were obtained from 168 mummified individuals recovered during excavations of cementeries S and R (A.D. 550-1450), at Kulubnarti, Republic of the Sudan (Van Gerven et al., 1981). Concentrations of calcium (Ca), magnesium (Mg), strontium (Sr), manganese (Mn), zinc (Zn), iron (Fe), and copper (Cu) were determined using inductively coupled plasma emission spectrometry (ICP) (Sandford, 1984; Sandford et al., 1983). Following univariate statistical reanalyses of these data (Sandford and Kissling, 1993a, b), we applied principal component analysis and multidimensional scaling to clarify their multivariate structure. Similar underlying associations were revealed in the two cemeteries. The first principal component, consisting of Mg, Ca, Sr, and Mn, may reflect inherent chemical similarities coupled with specific dietary factors (e.g., vegetation intakes) and physiological processes (e.g., bone remodeling). The second principal component, a contrast between Fe and Zn, may be due to their competitive relationship during absorption. The third principal component consists of Cu alone (in cemetery S), and Cu and Fe (in cemetery R), suggesting utilization of animal protein and an underlying synergism between Cu and Fe, respectively. Multidimensional scaling substantiates a three-dimensional model for describing elemental covariation. While interpretation of the first two dimensions was analogous to those of the first two principal components, the third dimension may represent antagonism between pairs of elements during absorption, transport and/or utilization (cemetery R: Cu vs. Zn; cemetery S: Cu vs. Zn, Fe vs. Mn). While these results provide the most persuasive evidence to date that elemental hair concentrations from this population reflect chiefly biogenic processes, isolation of diagenetic and exogenous effects requires further investigation through controlled studies.

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Seasonal variations in hair zinc concentrations in Canadian and African children

Cited by 28 publications

References 15 publications

Processing of complementary food does not increase hair zinc levels and growth of infants in Kilosa district, rural Tanzania

Processing of complementary food does not increase hair zinc levels and growth of infants in Kilosa district, rural Tanzania

Hair cortisol reflects socio-economic factors and hair zinc in preschoolers

Multivariate analyses of elemental hair concentrations from a medieval Nubian population

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