Use of national food balance data to estimate the adequacy of zinc in national food supplies: methodology and regional estimates

Wuehler, Sara; Peerson, Janet M; Brown, Kenneth H.

doi:10.1079/phn2005724

Cited by 160 publications

(117 citation statements)

References 7 publications

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“…According to the range of phytate contents reported by Brown et al (7) for the different sources of food and taking into account the food consumption among the participants of the present assay, the phytate:Zn ratio in our study ranged from 2 to 11, which would correspond to a high-moderate Zn bioavailability diet. The maximum value is comparable with the overall range of phytate:Zn molar ratio reported by Wuehler et al (33) for Western Europeans (10?6) and with the mean value of 10?1 observed in Koreans consuming varied diets but rich in vegetables, legumes, grains and cereals (34) . Based on the phytate:Zn ratio calculated in the present assay, a proportion of 30-45 % of dietary Zn available for absorption would be expected (35) .…”

Section: Zn Absorption and Bioavailabilitysupporting

confidence: 89%

Is the Mediterranean diet adequate to satisfy zinc requirements during adolescence?

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2012

Public Health Nutr.

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Objective: To evaluate Zn utilization and status among a sample of Spanish boys consuming a diet based on Mediterranean patterns. Design: Dietary Zn balance was assessed by means of Zn intake in food and Zn output in faeces and urine as measured by flame atomic absorption spectrophotometry. In addition, biomarkers of Zn status were analysed. Setting: Province of Granada, Spain. Subjects: Twenty healthy male adolescents aged 11-14 years, selected based on medical questionnaire, physical examination and nutritional survey of food habits and lifestyle. Results: Mean Zn intake was 11?36 (SE 0?31) mg/d, 76% of the recommended value for Spanish adolescents. Zn absorption (2?53 (SE 0?55) mg/d) was close to the value of 3?0 mg/d required for the growth spurt. Zn status biomarkers and growth parameters were within the normal values for this age group. Conclusions: Although a diet based on Mediterranean patterns is associated with factors which can affect Zn absorption, such as high consumption of phytate, its consumption in adequate amounts allows Zn status to be maintained during adolescence. Due to the importance of Zn in preventing growth and behavioural disorders among adolescents, long-term intervention trials to investigate the suitability of the Mediterranean diet with respect to Zn requirements at this time of life are needed.

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Section: Zn Absorption and Bioavailabilitysupporting

confidence: 89%

Is the Mediterranean diet adequate to satisfy zinc requirements during adolescence?

Mesías

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2012

Public Health Nutr.

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“…In principle, FBS data could also be used to assess the level of micronutrient supply (Wuehler et al, 2005), but aggregation problems with country level data weigh more heavily for micronutrient than for calorie assessments. A second question concerns the accuracy of the FBS data, which build on the FAOSTAT data base.…”

Section: Mean Dietary Energy Supply (Des)mentioning

confidence: 99%

What do we really know? Metrics for food insecurity and undernutrition

2011

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Standard-Nutzungsbedingungen:Die Dokumente auf EconStor dürfen zu eigenen wissenschaftlichen Zwecken und zum Privatgebrauch gespeichert und kopiert werden.Sie dürfen die Dokumente nicht für öffentliche oder kommerzielle Zwecke vervielfältigen, öffentlich ausstellen, öffentlich zugänglich machen, vertreiben oder anderweitig nutzen.Sofern die Verfasser die Dokumente unter Open-Content-Lizenzen (insbesondere CC-Lizenzen) zur Verfügung gestellt haben sollten, gelten abweichend von diesen Nutzungsbedingungen die in der dort genannten Lizenz gewährten Nutzungsrechte. Terms of use: Documents in What do we really know? Metrics for food insecurity and undernutritionAbstract. In this article, we critically review the three most common approaches of assessing chronic food insecurity and undernutrition: (i) the FAO indicator of undernourishment, (ii) household food consumption surveys, and (iii) childhood anthropometrics. There is a striking and worrying degree of inconsistency when one compares available estimates, which is due to methodological and empirical problems associated with all three approaches. Hence, the true extent of food insecurity and undernutrition is unknown. We discuss strengths and weaknesses of each approach and make concrete suggestions for improvement, which also requires additional research. A key component will be the planning and implementation of more comprehensive, standardized, and timely household surveys that cover food consumption and anthropometry, in addition to other socioeconomic and health variables.Such combined survey data will allow much better assessment of the problems' magnitude, as well as of trends, driving forces, and appropriate policy responses.

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“…Based on individual requirements for Zn and the absorbable content of each nation's food supply, it has been estimated that approximately 20 . 5% of the world's population are at increased risk of inadequate dietary Zn intake (7) . Zn deficiency may not be a result of inadequate intake per se but may arise through elevated Zn requirements, decreased absorption efficiency or even genetic predisposition.…”

Section: Zinc Deficiencymentioning

confidence: 99%

Does promoter methylation of the SLC30A5 (ZnT5) zinc transporter gene contribute to the ageing-related decline in zinc status?

2009

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A decline in Zn status with ageing may contribute to the development of frailty, including impaired immune function, and increased incidence of age-related degenerative diseases. This decline may be a result of reduced dietary Zn intake and/or impaired Zn absorption in the gut. The Zn transporter ZnT5 may play a key role in the absorption of dietary Zn. The corresponding gene (SLC30A5) has a CpG island in its promoter region, so could be regulated by epigenetic mechanisms. It is hypothesised that methylation of the SLC30A5 promoter region is increased with age and that a resulting reduction in ZnT5 expression contributes to the decline in Zn status observed with ageing. This hypothesis has been addressed through (1) studies of effects of SLC30A5 promoter methylation on gene expression in vitro and (2) in vivo measurements of the DNA methylation status of this gene domain. It has been established in vitro that methylation of the human SLC30A5 promoter region results in reduced expression of an associated reporter gene. Second, this gene region shows variable levels of methylation in vivo. Correlation between the level of methylation at this locus and age would support the hypothesis that age-related hypermethylation of this region has the potential to modulate dietary Zn absorption. This premise is being investigated by analysis of additional samples from a human adult cohort to test the hypothesis that methylation of the SLC30A5 promoter region contributes to the age-related decline in Zn status.

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Use of national food balance data to estimate the adequacy of zinc in national food supplies: methodology and regional estimates

Cited by 160 publications

References 7 publications

Is the Mediterranean diet adequate to satisfy zinc requirements during adolescence?

Is the Mediterranean diet adequate to satisfy zinc requirements during adolescence?

What do we really know? Metrics for food insecurity and undernutrition

Does promoter methylation of the SLC30A5 (ZnT5) zinc transporter gene contribute to the ageing-related decline in zinc status?

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