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Note that we want only enough information to convincingly support the assertion and counter inaccurate information. When making a point, it is important to find those sources that will result in the most convincing arguments, and to summarize findings in the most convincing manner, all without misrepresenting or exaggerating those sources.
Places to start for research:
Is there research showing that vegans are generally not deficient in choline, or that non-vegans are?
- This fact sheet supports the assertion that choline from animal sources is not necessary and may be harmful to health.
- In general, the nutrient choline is most highly concentrated in animal-derived foods such as eggs and meat. This has led to claims that vegans are at risk of becoming deficient in choline.
- A 2019 editorial published in the journal BMJ made headlines by expressing concern about choline deficiency in those eating plant-based diets.
- Choline produces a byproduct called TMAO in the body. A study in the New England Journal of Medicine found that TMAO increases the likelihood of stroke, heart disease, and even death. The study recommends that excess choline intake should be avoided and suggests that a high-fiber or vegetarian diet is an effective way to do this.
- Another study also found that high choline intake is linked to heart disease, but noted that vegans and vegetarians are protected from its effects.
- Other research has supported this by showing that since vegans have different gut flora to omnivores, they produce very little TMAO.
- Egg consumption has been linked to an increased risk of prostate cancer, and researchers suggest that choline may be the culprit.
- TMAO has also been linked to chronic kidney disease.
- In some people, excess choline consumption causes a strong fishy body odor, including the breath, urine, and sweat.
- The USDA has published a database of the choline content of various foods. It shows that eggs are extremely high in choline, containing about three times as much as meat and fish. However, wholegrains contain almost as much choline as meat and fish, and breakfast cereals are also a good source. Overall, fruits and vegetables are a better source than milk. The database also shows that some individual plant foods have a very high choline content, such as wheat germ, soy flour, quinoa, and peanut butter.
- In 2019, an article was published in the journal BMJ claiming that those eating plant-based diets may be at risk of choline deficiency. In the media, the article was referred to as a study, but in reality it is an editorial and the author did not carry out any research. Moreover, the author has ties to the egg and meat industries and so the article cannot be considered unbiased.
- Two studies carried out in 2004 and 2009 appeared to show that low choline intake in pregnant women could increase the risk of babies being born with neural tube defects. However, more recent research does not support this claim.
- The National Institutes for Health (NIH) state that cruciferous vegetables and some beans are "rich in choline." It shows that soybeans contain more choline than ground beef, chicken breast, or cod, while mushrooms and potatoes contain more than tuna and dairy products. Quinoa, wheat germ, and kidney beans are also good sources.
- The Physicians' Committee for Responsible Medicine recommends choosing plant-based sources of choline because animal sources (such as eggs) are often very high in saturated fat. It points out that high saturated fat consumption increases the risk of heart disease and dementia.
- Tom Sanders, Professor Emeritus of Nutrition and Dietetics at King's College London, has stated that "There is no justification for suggesting that plant-based diets risk damaging brain development...My own research on vegans and those of others in Europe and USA find the growth and development of vegans and vegetarians is normal." He points out that the body can make some of its own choline and that the nutrient is "abundant" in several plant-based foods.
- According to the NIH, most people in the USA do not achieve the adequate intake for choline established by the Food and Nutrition Board of the Institute of Medicine. This is despite eating a diet high in animal products. However, actual rates of choline deficiency are very low, suggesting that the AI may not be accurate. This may be because the body produces some of its own choline, which may not have been sufficiently accounted for.
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- “Office of Dietary Supplements - Choline.” Accessed January 20, 2020. https://ods.od.nih.gov/factsheets/Choline-HealthProfessional/.
- Derbyshire, Emma. “Could We Be Overlooking a Potential Choline Crisis in the United Kingdom?” BMJ Nutrition, Prevention & Health 2, no. 2 (December 1, 2019): 86–89. Accessed January 20, 2020. https://doi.org/10.1136/bmjnph-2019-000037.
- Tang, W.H. Wilson, Zeneng Wang, Bruce S. Levison, Robert A. Koeth, Earl B. Britt, Xiaoming Fu, Yuping Wu, and Stanley L. Hazen. “Intestinal Microbial Metabolism of Phosphatidylcholine and Cardiovascular Risk.” New England Journal of Medicine 368, no. 17 (April 25, 2013): 1575–84. Accessed January 20, 2020. https://doi.org/10.1056/NEJMoa1109400.
- Zhu, Weifei, Zeneng Wang, W. H. Wilson Tang, and Stanley L. Hazen. “Gut Microbe-Generated Trimethylamine N -Oxide From Dietary Choline Is Prothrombotic in Subjects.” Circulation 135, no. 17 (April 25, 2017): 1671–73. Accessed January 20, 2020. https://doi.org/10.1161/CIRCULATIONAHA.116.025338.
- Koeth, Robert A., Zeneng Wang, Bruce S. Levison, Jennifer A. Buffa, Elin Org, Brendan T. Sheehy, Earl B. Britt, et al. “Intestinal Microbiota Metabolism of l -Carnitine, a Nutrient in Red Meat, Promotes Atherosclerosis.” Nature Medicine 19, no. 5 (May 2013): 576–85. Accessed January 21, 2020. https://doi.org/10.1038/nm.3145.
- Richman, Erin L, Stacey A Kenfield, Meir J Stampfer, Edward L Giovannucci, Steven H Zeisel, Walter C Willett, and June M Chan. “Choline Intake and Risk of Lethal Prostate Cancer: Incidence and Survival.” The American Journal of Clinical Nutrition 96, no. 4 (October 1, 2012): 855–63. Accessed January 20, 2020. https://doi.org/10.3945/ajcn.112.039784.
- Richman, E. L., S. A. Kenfield, M. J. Stampfer, E. L. Giovannucci, and J. M. Chan. “Egg, Red Meat, and Poultry Intake and Risk of Lethal Prostate Cancer in the Prostate-Specific Antigen-Era: Incidence and Survival.” Cancer Prevention Research 4, no. 12 (December 1, 2011): 2110–21. Accessed January 20, 2020. https://doi.org/10.1158/1940-6207.CAPR-11-0354.
- Richman, Erin L, Meir J Stampfer, Alan Paciorek, Jeanette M Broering, Peter R Carroll, and June M Chan. “Intakes of Meat, Fish, Poultry, and Eggs and Risk of Prostate Cancer Progression.” The American Journal of Clinical Nutrition 91, no. 3 (March 1, 2010): 712–21. Accessed January 20, 2020. https://doi.org/10.3945/ajcn.2009.28474.
- Moraes, Cristiane, Denis Fouque, Ana Claudia F. Amaral, and Denise Mafra. “Trimethylamine N-Oxide From Gut Microbiota in Chronic Kidney Disease Patients: Focus on Diet.” Journal of Renal Nutrition 25, no. 6 (November 2015): 459–65. Accessed January 20, 2020. https://doi.org/10.1053/j.jrn.2015.06.004.
- Tang, W.H. Wilson, Zeneng Wang, David J. Kennedy, Yuping Wu, Jennifer A. Buffa, Brendan Agatisa-Boyle, Xinmin S. Li, Bruce S. Levison, and Stanley L. Hazen. “Gut Microbiota-Dependent Trimethylamine N -Oxide (TMAO) Pathway Contributes to Both Development of Renal Insufficiency and Mortality Risk in Chronic Kidney Disease.” Circulation Research 116, no. 3 (January 30, 2015): 448–55. Accessed January 20, 2020. https://doi.org/10.1161/CIRCRESAHA.116.305360.
- Rehman, H. U. “Fish Odour Syndrome.” Postgraduate Medical Journal 75, no. 886 (August 1, 1999): 451–52. Accessed January 20, 2020. https://doi.org/10.1136/pgmj.75.886.451.
- Patterson, Kristine Y. et al. “USDA Database for the Choline Content of Common Foods.” USDA, January 2008. Accessed January 21, 2020. https://data.nal.usda.gov/system/files/Choln02.pdf.
- Shaw, G. M., S. L. Carmichael, W. Yang, S. Selvin, and D. M. Schaffer. “Periconceptional Dietary Intake of Choline and Betaine and Neural Tube Defects in Offspring.” American Journal of Epidemiology 160, no. 2 (July 15, 2004): 102–9. https://doi.org/10.1093/aje/kwh187.
- Shaw, Gary M., Richard H. Finnell, Henk J. Blom, Suzan L. Carmichael, Stein Emil Vollset, Wei Yang, and Per M. Ueland. “Choline and Risk of Neural Tube Defects in a Folate-Fortified Population:” Epidemiology 20, no. 5 (September 2009): 714–19. https://doi.org/10.1097/EDE.0b013e3181ac9fe7.
- Mills, James L, Ruzong Fan, Lawrence C Brody, Aiyi Liu, Per M Ueland, Yifan Wang, Peadar N Kirke, Barry Shane, and Anne M Molloy. “Maternal Choline Concentrations during Pregnancy and Choline-Related Genetic Variants as Risk Factors for Neural Tube Defects.” The American Journal of Clinical Nutrition 100, no. 4 (October 1, 2014): 1069–74. https://doi.org/10.3945/ajcn.113.079319.
- Carmichael, Suzan L., Wei Yang, and Gary M. Shaw. “Periconceptional Nutrient Intakes and Risks of Neural Tube Defects in California.” Birth Defects Research Part A: Clinical and Molecular Teratology 88, no. 8 (2010): 670–78. https://doi.org/10.1002/bdra.20675.
- Chandler, Angela L., Charlotte A. Hobbs, Bridget S. Mosley, Robert J. Berry, Mark A. Canfield, Yan Ping Qi, Anna Maria Siega‐Riz, and Gary M. Shaw. “Neural Tube Defects and Maternal Intake of Micronutrients Related to One-Carbon Metabolism or Antioxidant Activity.” Birth Defects Research Part A: Clinical and Molecular Teratology 94, no. 11 (2012): 864–74. https://doi.org/10.1002/bdra.23068.
- Physicians Committee for Responsible Medicine. “Clearing Up Choline Confusion.” Accessed January 20, 2020. https://www.pcrm.org/news/blog/clearing-choline-confusion.
- Gilliver, Liam. “Rachel Riley Defends Plant-Based Diet Amid Concerns Around Choline.” Vegan News, Plant Based Living, Food, Health & more. Accessed January 21, 2020. https://www.plantbasednews.org/news/rachel-riley-defends-plant-based-diet.
- Hollenbeck, Clarie B. “An Introduction to the Nutrition and Metabolism of Choline.” Central Nervous System Agents in Medicinal Chemistry 12, no. 2 (June 2012): 100–113. Accessed January 21, 2020. https://doi.org/10.2174/187152412800792689.
This fact sheet was originally authored by Greg Fuller and copyedited by Isaac Nickerson. The contents may have been edited since that time by others.