Evidence map›Paper›PMID 26108545›Full record

SynthesisThe Journal of nutrition2015

Zinc Absorption Is Not Related to Dietary Phytate Intake in Infants and Young Children Based on Modeling Combined Data from Multiple Studies.

Leland V Miller, K Michael Hambidge, Nancy F Krebs

Registry-linked trialOpen access · bronzeAbstract readMeta-Analysis
In one paragraph

Synthesis in The Journal of nutrition, 2015. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT01783067 (Zinc and Iron Bioavailability From Bio-fortified Pearl Millet), which is not on this map. Cited by 22 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
22citing papers in PubMed, 1 pooled it
6.7field-weighted citation impact, top 4% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

NCT01783067 nacompletednot on this map

Zinc and Iron Bioavailability From Bio-fortified Pearl Millet

TypeinterventionalSponsorUniversity of Colorado, DenverRan2011 to 2012Enrolled44ConditionsNutritional DeficiencyArmsPearl millet, Biofortified pearl millet
3 · Its place in the literature

Who cites it

22 citing papers in PubMed, 1 synthesis or guideline pooled it, 59 citations in OpenAlex.

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4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

3 authors at 1 institution in 1 country.

Leland V MillerSection of Nutrition, Department of Pediatrics, University of Colorado Denver School of Medicine, Aurora, CO leland.miller@ucdenver.edu.
K Michael HambidgeSection of Nutrition, Department of Pediatrics, University of Colorado Denver School of Medicine, Aurora, CO.
Nancy F KrebsSection of Nutrition, Department of Pediatrics, University of Colorado Denver School of Medicine, Aurora, CO.
University of Colorado Denver · US

Funding

Nutrition-specific interventions to improve long-term maternal-child health outcomesUG1HD076474 · NICHD · UNIVERSITY OF COLORADO DENVER · PI Edwin Jose Asturias, NANCY F KREBS · 2018 to 2026
$5.4M
The Global Network and Preconception Maternal NutritionU10HD076474 · NICHD · UNIVERSITY OF COLORADO DENVER · PI HAMBIDGE, K MICHAEL, KREBS, NANCY F · 2013 to 2017
$5.1M
FOSTERING PATIENT ORIENTED RESEARCH IN PEDIATRIC NUTRITIONK24DK083772 · NIDDK · UNIVERSITY OF COLORADO DENVER · PI KREBS, NANCY F · 2009 to 2013
$753k
NICHD NIH HHS U10 HD076474NICHD NIH HHS UG1 HD076474NIDDK NIH HHS DK083772
6 · The paper itself

Abstract

backgroundIt is widely understood that the 2 primary factors affecting dietary zinc absorption in adults are the quantities of zinc and phytate in the diet. Although a similar association of absorption to dietary zinc and phytate is presumed to exist in children, to our knowledge, no large-scale examination of the relation of zinc absorption to dietary and growth factors has been conducted.

objectiveThe goal was to apply an adult absorption model and related models to data from zinc absorption studies of infants and children in order to determine the nature of the relation of zinc absorption to dietary zinc and phytate, age, body size, and zinc homeostatic variables.

methodsData from 236 children between 8 and 50 mo of age were obtained from stable-isotope studies of zinc absorption. Statistical and mechanistic models were fit to the data using linear and nonlinear regression analysis.

resultsThe effect of dietary phytate on zinc absorption when controlling for dietary zinc was very small and not statistically discernable (P = 0.29). A 500-mg/d increase in dietary phytate reduced absorbed zinc by <0.04 mg/d. Absorption was observed to vary with age, weight, and height (P < 0.0001) when controlling for dietary zinc. For example, absorption from 6 mg/d of dietary zinc increased by as much as 0.2 mg/d with a 12-mo increase in age. Absorption varied with weight and exchangeable zinc pool size (0.01 < P < 0.05) when controlling for dietary zinc and age.

conclusionsThe absence of a detectable phytate effect on zinc absorption raises caution about use of dietary phytate:zinc molar ratios to predict zinc bioavailability and does not support phytate reduction as a strategy to improve zinc status of young children. The effect of age on zinc absorption and the absence of a phytate effect should facilitate estimations of dietary zinc needs in young children.

Indexed as

Child, PreschoolDietFood AnalysisHumansInfantModels, BiologicalPhytic AcidZincPhytic AcidZincdietary phytatedietary zincinfantsmathematical modelingyoung childrenzinc absorption

Identifiers

PMID26108545
PMCPMC4516773
OpenAlexW2142801417

What OpenQuestion holds

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Registered trials

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.