Trial reportBiological trace element research2021
Plasma and Nail Zinc Concentrations, But Not Hair Zinc, Respond Positively to Two Different Forms of Preventive Zinc Supplementation in Young Laotian Children: a Randomized Controlled Trial.
Trial report in Biological trace element research, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. It is linked to trial NCT02428647 (Lao Zinc Study), which is not on this map. Cited by 15 papers, 3 of them syntheses that pooled 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.
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.
Lao Zinc Study: The Effects of Two Forms of Daily Preventive Zinc Supplementation Versus Therapeutic Zinc Supplementation for Diarrhea on Young Children's Physical Growth and Risk of New Episodes of Diarrhea
Who cites it
15 citing papers in PubMed, 3 syntheses or guidelines pooled it, 21 citations in OpenAlex.
- Genetic determinants of zinc homeostasis and its role in cardiometabolic diseases.PLoS genetics · 2025Pooled it
- Community-Based Child Food Interventions/Supplements for the Prevention of Wasting in Children Up to 5 Years at Risk of Wasting and Nutritional Oedema: A Systematic Review and Meta-Analysis.Nutrition reviews · 2025Pooled it
- Methods of Assessment of Zinc Status in Humans: An Updated Review and Meta-analysis.Nutrition reviews · 2025Pooled it
- Serum zinc deficiency and progression of cardiovascular- kidney-metabolic syndrome.Frontiers in nutrition · 2026Article
- Nail structural alterations and zinc levels in the elderly: an observational cross-sectional study.PeerJ · 2026Observational
- Impact of a High-Fat High-Carbohydrate (HFHC) Diet at a Young Age on Steroid Hormone Hair Concentrations in Mice: A Comparison with a Control Diet and Nutraceutical Supplementation.Life (Basel, Switzerland) · 2025Article
- Application of an Ecological Approach to Assessment of Nutrition in School-Aged Children-A Report from the "Biomarkers of Nutrition for Development: Knowledge Indicating Dietary Sufficiency (BOND-KIDS)" Project Working Group 3.The Journal of nutrition · 2025Review
- BPA Exacerbates Zinc Deficiency-Induced Testicular Tissue Inflammation in Male Mice Through the TNF-α/NF-κB/Caspase8 Signaling Pathway.Biological trace element research · 2025Article
- Biochemical Markers of Zinc Nutrition.Biological trace element research · 2024Review
- The future backbone of nutritional science: integrating public health priorities with system-oriented precision nutrition.The British journal of nutrition · 2024Review
- Zinc supplementation for preventing mortality, morbidity, and growth failure in children aged 6 months to 12 years.The Cochrane database of systematic reviews · 2023Review
- Single hair analysis by X-ray fluorescence spectrometry detects small changes in dietary zinc intake: A nested randomized controlled trial.Frontiers in nutrition · 2023Article
- Article
- Effect of a Fortified Dairy-Based Drink on Micronutrient Status, Growth, and Cognitive Development of Nigerian Toddlers- A Dose-Response Study.Frontiers in nutrition · 2022Article
- The potential of spot urine as a biomarker for zinc assessment in Malawian children and adults.Frontiers in nutrition · 2022Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
8 authors at 2 institutions in 1 country.
Funding
Abstract
Plasma zinc concentrations (PZC) have been shown to significantly increase during zinc supplementation. This study investigated the effects of daily preventive zinc supplementation on hair and nail zinc concentrations compared with a control group. In a randomized controlled trial, 6- to 23-month-old children (n = 3407) in Lao PDR were randomly assigned to one of four groups and followed for ~ 36 weeks: daily preventive zinc dispersible tablet (7 mg/d; PZ), daily micronutrient powder (10 mg zinc/d; MNP), therapeutic zinc supplements for diarrhea treatment (20 mg/d for 10 days; TZ), or daily placebo powder (Control). Plasma, hair, and nail zinc concentrations were assessed in a sub-sample of participants (n = 457) at baseline and endline. At baseline, 75% of children had low PZC (< 65 μg/dL). At endline, geometric mean (95% CI) PZC were greater in the PZ and MNP groups compared with the TZ and control groups (P < 0.01), but hair zinc concentrations did not differ among groups (P = 0.99). Nail zinc concentrations were marginally higher in the PZ (115.8 (111.6, 119.9) μg/g) and the MNP (117.8 (113.3, 122.3) μg/g) groups than in the TZ group (110.4 (106.0, 114.8) μg/g; P = 0.055) at endline. This study does not support the use of hair zinc as a biomarker of zinc exposure in young children. However, it provides some evidence that zinc concentrations in nails may respond to supplemental zinc interventions and supports the need for collecting additional data on this emerging biomarker.
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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 Socratic graph.