Cited by 240Nutritional Studies and DietFatty Acid Research and HealthGut microbiota and health

Effect of egg ingestion on trimethylamine-N-oxide production in humans: a randomized, controlled, dose-response study , , ,

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Miller, Carolyn A, Corbin, Karen D, da Costa, Kerry-Ann, Zhang, Shucha, Zhao, Xueqing, Galanko, Joseph A, Blevins, Tondra, Bennett, Brian J +2 more·2014·The American Journal of Clinical Nutrition

Abstract

Background It is important to understand whether eating eggs, which are a major source of dietary choline, results in increased exposure to trimethylamine-N-oxide (TMAO), which is purported to be a risk factor for developing heart disease.Objective We determined whether humans eating eggs generate TMAO and, if so, whether there is an associated increase in a marker for inflammation [ie, high-sensitivity C-reactive protein (hsCRP)] or increased oxidation of low-density lipoprotein (LDL).Design In a longitudinal, double-blind, randomized dietary intervention, 6 volunteers were fed breakfast doses of 0, 1, 2, 4, or 6 egg yolks. Diets were otherwise controlled on the day before and day of each egg dose with a standardized low-choline menu. Plasma TMAO at timed intervals (immediately before and 1, 2, 4, 8, and 24 h after each dose), 24-h urine TMAO, predose and 24-h postdose serum hsCRP, and plasma oxidized LDL were measured. Volunteers received all 5 doses with each dose separated by >2-wk washout periods.Results The consumption of eggs was associated with increased plasma and urine TMAO concentrations (P < 0.01), with ∼14% of the total choline in eggs having been converted to TMAO. There was considerable variation between individuals in the TMAO response. There was no difference in hsCRP or oxidized LDL concentrations after egg doses.Conclusions The consumption of ≥2 eggs results in an increased formation of TMAO. Choline is an essential nutrient that is required for normal human liver and muscle functions and important for normal fetal development. Additional study is needed to both confirm the association between TMAO and atherosclerosis and identify factors, microbiota and genetic, that influence the generation of TMAO before policy and medical recommendations are made that suggest reduced dietary choline intake.

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Crossref · 10.3945/ajcn.114.087692

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Authors
Miller, C. A., Corbin, K. D., da Costa, K.-A., Zhang, S., Zhao, X., Galanko, J. A., Blevins, T., Bennett, B. J., O’Connor, A., & Zeisel, S. H.
Affiliations
University of North Carolina at Chapel Hill (US)
Venue
The American Journal of Clinical Nutrition
Publisher
Elsevier BV
Published
2014-09
Volume
100
Issue
3
Pages
778-786
ISSN
0002-9165 (ISSN-L)
OpenAlex
W2073054952
Cited by
240
References
32
Citations by year
2026: 10 · 2025: 12 · 2024: 11 · 2023: 14 · 2022: 16 · 2021: 27 · 2020: 30 · 2019: 25 · 2018: 29 · 2017: 23 · 2016: 24 · 2015: 16 · 2014: 3
FWCI
21.89
Type
journal article
Language
en
Open access
Locations
  • American Journal of Clinical Nutrition (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
National Institute of Diabetes and Digestive and Kidney Diseases (DK56350, P30DK034987, P30DK056350)
Topics
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Nutritional Studies and Diet
  • Health Sciences › Nursing › Nutrition and Dietetics › Fatty Acid Research and Health
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Gut microbiota and health
Keywords
trimethylamine N-oxide, dietary choline, dietary cholesterol, gut microbiota, C-reactive protein, inflammation, oxidized LDL, atherosclerosis risk, dose-response relationship
MeSH terms
Adult, C-Reactive Protein, Choline, Double-Blind Method, Egg Yolk, Eggs, Female, Heart Diseases, Humans, Lipoproteins, LDL, Longitudinal Studies, Male, Methylamines, Middle Aged, North Carolina, Pilot Projects, Risk Factors, Biomarkers, Up-Regulation, Cross-Over Studies

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