The Study
Impact of zinc supplementation on morbidity from diarrhea and respiratory infections among rural Guatemalan children.
This study gave some kids zinc pills and others fake pills to see if zinc helped them get sick less. It found that kids who got zinc got diarrhea fewer times, but it didn't help with coughs or colds. We can't say zinc definitely stops all sickness, but it might help with diarrhea in kids like these.
Analysis score
Maximum 90 for a randomized controlled trial.
Where the score came from
Babies in Guatemala who got a daily zinc pill got fewer bouts of diarrhea, especially if they were boys or underweight, but the pills didn't help with coughs or colds.
Where does this study sit?
Systematic Reviews & Meta-analyses
Max 100Randomized Trials
Max 90Cohort Studies
Max 72Case-Control
Max 58Cross-Sectional
Max 44Case Reports & Series
Max 30Expert Opinion
Max 563 / 100
Quality score
Participants are randomly assigned to treatment or control groups, minimizing bias. Considered the gold standard for testing whether an intervention causes an effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes — fewer diarrhea episodes means less dehydration, hospital visits, and risk of death in malnourished infants.
- 2Zinc reduced diarrhea episodes by 22%, and cut persistent diarrhea by 67%.
- 3Boys and underweight babies saw 39% fewer episodes.
- 4No change in respiratory infections.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Pediatrics
Year
1997
Authors
M. Ruel, Juan A Rivera, M. C. Santizo, Bo Lönnerdal, Kenneth H. Brown
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.