The Study
Effects of walnuts consumption on vascular endothelial function in humans: A systematic review and meta-analysis of randomized controlled trials.
This study combines results from several experiments where people were randomly given walnuts or not to see how their blood vessels work. It shows that eating walnuts might help blood vessels work better, but we can’t be 100% sure how strong the effect is because we didn’t get to see all the details of the original studies.
Analysis score
Maximum 100 for a systematic review with meta-analysis.
Where the score came from
This study looks at whether eating walnuts helps blood vessels stay healthy in adults.
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 553 / 100
Quality score
The highest quality evidence. These studies systematically search, appraise, and synthesize results from multiple individual studies, providing the most reliable summary of current knowledge.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, this improvement suggests walnuts may help reduce early signs of heart disease.
- 2Walnuts improved blood vessel function by a moderate amount (SMD: 0.40) across 5 studies with 323 people.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Clinical nutrition ESPEN
Year
2018
Authors
M. Mohammadi-Sartang, N. Bellissimo, Julia O. Totosy de Zepetnek, Hadi Bazyar, M. Mahmoodi, Z. Mazloom
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.