Cited by 226Dialysis and Renal Disease ManagementNutritional Studies and DietGut microbiota and health

The production of p-cresol sulfate and indoxyl sulfate in vegetarians versus omnivores

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Patel, Kajal P., Luo, Frank J.-G., Plummer, Natalie S., Hostetter, Thomas H., Meyer, Timothy W.·2012·Clinical Journal of the American Society of Nephrology

Abstract

BACKGROUND AND OBJECTIVES: The uremic solutes p-cresol sulfate (PCS) and indoxyl sulfate (IS) are generated by colon bacteria acting on food components that escape absorption in the small bowel. The production of these potentially toxic compounds may thus be influenced by diet. This study examined whether production of PCS and IS is different in vegetarians and omnivores. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: The production of PCS and IS was assessed by measuring their urinary excretion rates in participants with normal kidney function. Studies were carried out in 15 vegetarians and 11 individuals consuming an unrestricted diet. Participants recorded food intake over 4 days and collected urine over the final 2 days of each of two study periods, which were 1 month apart. RESULTS: Average PCS excretion was 62% lower (95% confidence interval [95% CI], 15-83) and average IS excretion was 58% lower (95% CI, 39-71) in vegetarians than in participants consuming an unrestricted diet. Food records revealed that lower excretion of PCS and IS in vegetarians was associated with a 69% higher (95% CI, 20-139) fiber intake and a 25% lower (95% CI, 3-42) protein intake. PCS and IS excretion rates varied widely among individual participants and were not closely correlated with each other but tended to remain stable in individual participants over 1 month. CONCLUSIONS: PCS and IS production rates are markedly lower in vegetarians than in individuals consuming an unrestricted diet.

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  • A reduced excretion of faecal phenols was observed after a 3-week high-resistant starch diet, and lower production of p-cresol sulfate and indoxyl sulfate was found in vegetarians.

    “Accordingly, a reduced excretion of faecal phenols was observed following a 3-week high-resistant starch diet, 59 while a significantly lower production of p-cresol sulfate and indoxyl sulfate were found in vegetarians.60”

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Authors
Patel, K. P., Luo, F. J.-G., Plummer, N. S., Hostetter, T. H., & Meyer, T. W.
Affiliations
  • VA Palo Alto Health Care System (US)
  • Case Western Reserve University (US)
Corresponding author
  • Patel, Kajal P.
  • Luo, Frank J.-G.
  • Plummer, Natalie S.
  • Meyer, Timothy W.
Venue
Clinical Journal of the American Society of Nephrology
Published
2012-06
Volume
7
Issue
6
Pages
982-988
ISSN
1555-9041 (ISSN-L)
OpenAlex
W2154905690
Cited by
226
References
35
Citations by year
2026: 17 · 2025: 11 · 2024: 15 · 2023: 12 · 2022: 21 · 2021: 25 · 2020: 18 · 2019: 18 · 2018: 15 · 2017: 16 · 2016: 15 · 2015: 21 · 2014: 8 · 2013: 13 · 2012: 1
FWCI
10.90
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
  • National Institute of Diabetes and Digestive and Kidney Diseases (R01DK080123, R01 DK80123)
  • National Center for Complementary and Integrative Health (R21AT005123)
Topics
  • Health Sciences › Medicine › Nephrology › Dialysis and Renal Disease Management
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
p-cresyl sulfate, indoxyl sulfate, uremic solutes, vegetarians, omnivores, dietary fiber, dietary protein, urinary excretion
MeSH terms
Adult, California, Cresols, Digestion, Female, Humans, Indican, Kidney, Male, Meat, Middle Aged, Sulfuric Acid Esters, Time Factors, Diet, Vegetarian, Biomarkers, Diet Records

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