The Study
Dietary Protein Intake and Single-Nephron Glomerular Filtration Rate
This study shows that people who eat more protein tend to have different kidney measurements, but it can't prove that eating protein actually changes how your kidneys work. It's like noticing that taller people often have bigger shoes - we don't know if being tall makes your feet grow bigger.
Analysis score
Maximum 44 for a cross-sectional study.
Where the score came from
Scientists checked if eating more protein makes tiny kidney parts work harder.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 527 / 100
Quality score
Snapshots of a population at a single point in time, or descriptions of small groups. Can identify correlations and prevalence, but cannot determine cause and effect.
Key takeaways
Summary
Based on the study abstract and findings.
- 1Yes, it shows protein intake may strain kidneys in healthy people.
- 2More protein linked to 0.42 higher filter rate; average filters per kidney: 685,000.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Nutrients
Year
2020
Authors
R. Oba, G. Kanzaki, Takaya Sasaki, Yusuke Okabayashi, K. Haruhara, K. Koike, A. Kobayashi, I. Yamamoto, N. Tsuboi, T. Yokoo
Related Content
Claims (7)
Eating a lot of protein doesn't hurt your kidneys, and this is shown by normal test results for kidney health.
Eating a lot of protein might put extra strain on your kidneys, which could be harmful over time.
Scientists counted the tiny filters in healthy Japanese people's kidneys and found there are about 685,000 on average, giving us the first clear picture of how many filters normal human kidneys have.
Scientists measured how fast tiny filters in the kidneys work in healthy people, and it's the first time they've directly checked this in living humans using special scans and tissue samples.
Eating more protein is linked to how well your kidneys filter blood, even when considering other health factors like weight and blood pressure.
Eating more protein, adjusted for your ideal weight, is linked to better kidney filtering in healthy Japanese adults, even when other health factors are considered.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.