Cited by 173Kidney Stones and Urolithiasis TreatmentsGout, Hyperuricemia, Uric AcidNephrotoxicity and Medicinal Plants

Determinants of 24-hour Urinary Oxalate Excretion

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Taylor, Eric N., Curhan, Gary C.·2008·Clinical Journal of the American Society of Nephrology

Abstract

BACKGROUND AND OBJECTIVES: Higher levels of urinary oxalate substantially increase the risk of calcium oxalate kidney stones. However, the determinants of urinary oxalate excretion are unclear. The objective was to examine the impact of dietary factors, age, body size, diabetes, and urinary factors on 24-h urinary oxalate. DESIGN, SETTING, PARTICIPANTS, AND MEASUREMENTS: We conducted a cross-sectional study of 3348 stone forming and non-stone-forming participants in the Health Professionals Follow-up Study (men), the Nurses' Health Study (older women), and the Nurses' Health Study II (younger women). RESULTS: Median urinary oxalate was 39 mg/d in men, 27 mg/d in older women, and 26 mg/d in younger women. Participants in the highest quartile of dietary oxalate excreted 1.7 mg/d more urinary oxalate than participants in the lowest quartile (P trend 0.001). The relation between dietary and urinary oxalate was similar in individuals with and without nephrolithiasis. Participants consuming 1000 mg/d or more of vitamin C excreted 6.8 mg/d more urinary oxalate than participants consuming <90 mg/d (P trend < 0.001). Body mass index, total fructose intake, and 24-h urinary potassium, magnesium, and phosphorus levels also were positively associated with urinary oxalate. Calcium intake and age were inversely associated with urinary oxalate. After adjustment for body size, participants with diabetes excreted 2.0 mg/d more urinary oxalate than those without diabetes (P < 0.01). CONCLUSIONS: The impact of dietary oxalate on urinary oxalate appears to be small. Further investigation of factors influencing urinary oxalate may lead to new approaches to prevent calcium kidney stones.

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Crossref · 10.2215/cjn.01410308

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  • Although dietary oxalate with high bioavailability increases plasma and urine levels, excreted oxalate is minimally dependent on diet in an epidemiological cohort.

    “Although dietary oxalate with high bioavailability increases plasma and urine levels (29), excreted oxalate is minimally dependent on diet in an epidemiological cohort (30).”

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Authors
Taylor, E. N., & Curhan, G. C.
Affiliations
Brigham and Women's Hospital (US)
Venue
Clinical Journal of the American Society of Nephrology
Published
2008-09
Volume
3
Issue
5
Pages
1453-1460
ISSN
1555-9041 (ISSN-L)
OpenAlex
W2102411545
Cited by
173
References
38
Citations by year
2026: 4 · 2025: 7 · 2024: 10 · 2023: 13 · 2022: 9 · 2021: 9 · 2020: 10 · 2019: 11 · 2018: 11 · 2017: 8 · 2016: 12 · 2015: 10 · 2014: 9 · 2013: 9 · 2012: 15
FWCI
7.96
Type
journal article
Language
en
Open access
Locations
  • Clinical Journal of the American Society of Nephrology (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health (5p01dk070756-05)
  • National Cancer Institute (CA-87969, CA-55075, P01CA087969, CA50385, P01CA055075, R01CA050385)
  • National Institute of Diabetes and Digestive and Kidney Diseases (P01-DK-070756, DK59583, DK73381, DK-70756, R01DK059583, K08DK073381)
Topics
  • Health Sciences › Medicine › Pulmonary and Respiratory Medicine › Kidney Stones and Urolithiasis Treatments
  • Health Sciences › Medicine › Nephrology › Gout, Hyperuricemia, Uric Acid
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Nephrotoxicity and Medicinal Plants
Keywords
urinary oxalate, calcium oxalate stones, kidney stones, dietary oxalate, vitamin C, fructose consumption, body mass index, urinary potassium, urinary magnesium, urinary phosphorus, calcium intake, diabetes mellitus, age, kidney stone prevention
MeSH terms
Adult, Age Factors, Aged, Ascorbic Acid, Body Weight, Circadian Rhythm, Cross-Sectional Studies, Diet, Female, Fructose, Humans, Kidney Calculi, Magnesium, Male, Middle Aged, Oxalates, Phosphorus, Potassium, Nutrition Assessment, Body Mass Index, Dietary Supplements, Diabetes Complications

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