Less well known than vitamins, choline is nevertheless essential. It forms part of all our cell membranes, enables the liver to export fats and supplies acetylcholine, a nervous-system messenger. How much is needed, where can it be found, what do brain and pregnancy studies really say, and which supplemental form should you choose? Answers supported by figures.
Key takeaways
- Choline is essential: the liver makes it, but not enough to meet requirements.
- EFSA sets adequate intake at 400mg daily in adults, 480mg during pregnancy and 520mg during breastfeeding.
- Liver, eggs, meat, fish and soy are the best sources: a large egg supplies around 147mg.
- Three claims are authorised (lipids, liver, homocysteine); none concerns the brain or memory.
What is choline and what does it do?
Choline is a small nitrogen-containing molecule. The liver can produce it, but the US NIH says this is insufficient: diet must complement production.
- Membranes: it is part of phosphatidylcholine and sphingomyelin, components of all cell membranes.
- Liver and fats: it allows the liver to export fats to the rest of the body.
- Acetylcholine: it is the raw material for this chemical messenger in nerves and muscles.
- Homocysteine: converted to betaine, it participates in homocysteine recycling.
What happens in deficiency? In a depletion study, 57 adults followed a very low-choline diet (below 50mg daily). Fatty liver or muscle damage appeared in 77% of men and 80% of postmenopausal women, but only 44% of premenopausal women: oestrogens stimulate liver choline synthesis. All abnormalities resolved after choline was restored.
How much choline is needed daily?
Without sufficient data to calculate exact requirements, EFSA set adequate intakes in 2016, based on observed intakes in healthy European populations.
| Population | Adequate intake (EFSA) |
|---|---|
| Infants aged 7 to 11 months | 160mg/day |
| Children aged 1 to 3 years | 140mg/day |
| Adolescents aged 15 to 17 years | 400mg/day |
| Adults | 400mg/day |
| Pregnancy | 480mg/day |
| Breastfeeding | 520mg/day |
US references are higher: 550mg for men, 425mg for women, 450mg during pregnancy and 550mg during breastfeeding. A European estimate puts average adult intake at 291 to 468mg daily depending on country. In the US, most people consume below the reference, including 90 to 95% of pregnant women.
Which foods are richest in choline?
Animal foods are most concentrated, but some plants contribute too. The table gives serving content and percentage of adult adequate intake (400mg) covered.
| Food (serving) | Choline | % of 400mg |
|---|---|---|
| Pan-fried beef liver (85 g) | 356mg | 89% |
| Hard-boiled egg (1 large) | 147mg | 37% |
| Braised beef (85 g) | 117mg | 29% |
| Roasted soybeans (½ cup, ≈ 85 g) | 107mg | 27% |
| Roast chicken breast (85 g) | 72mg | 18% |
| Cooked cod (85 g) | 71mg | 18% |
| Baked potato (1 large) | 57mg | 14% |
| Toasted wheat germ (28 g) | 51mg | 13% |
| Kidney beans (½ cup, ≈ 130 g) | 45mg | 11% |
| Cooked quinoa (1 cup, ≈ 185 g) | 43mg | 11% |
| 1% fat milk (240 ml) | 43mg | 11% |
| Cooked broccoli (½ cup, ≈ 80 g) | 31mg | 8% |
Values from US USDA tables published by NIH; gram equivalents for cup servings are approximate.
What do regulations say about choline?
Three health claims are authorised in the EU, with exact wording:
- “Choline contributes to normal lipid metabolism”;
- “Choline contributes to the maintenance of normal liver function”;
- “Choline contributes to normal homocysteine metabolism”.
They can only appear on products supplying at least 82.5mg choline per 100 g, 100 ml or serving. No authorised claim concerns brain, memory or concentration. In 2023, EFSA also issued a favourable opinion on maternal choline's contribution to normal liver function in fetuses and breastfed infants. An opinion is not authorisation: use requires a Commission regulation adding it to the authorised claims list.
Bitartrate, alpha-GPC, citicoline and phosphatidylcholine: differences
In supplements, whether capsule, softgel or powder (see dosage forms), choline is always bound to another molecule, varying its actual content. NIH says no study compared the bioavailability of main forms directly.
| Form | Choline (approximate) | What to know |
|---|---|---|
| Choline bitartrate | 41% | Common form; increases TMAO |
| Alpha-GPC (glycerophosphocholine) | 40% | Choline bound to glycerophosphate |
| Citicoline (CDP-choline) | 20% | EU-authorised novel food: 500mg/day maximum, adults only |
| Phosphatidylcholine (lecithin) | 13 to 14% | Main food form |
Percentages calculated from each form's chemical formula; phosphatidylcholine varies with its fatty acids.
In practice, 1 g bitartrate supplies around 410mg choline, versus 130 to 140mg in 1 g phosphatidylcholine. Compare the label's choline amount, not the salt weight.
Choline and pregnancy: what does research suggest?
During pregnancy and breastfeeding, mothers transfer choline to the fetus and then baby through milk, explaining increased adequate intakes. In a controlled feeding trial, 26 women in their third trimester received 480 or 930mg choline daily until delivery. Babies in the 930mg group processed information faster between four and thirteen months.
Follow-up of twenty children at seven years showed better sustained attention in the same group. Encouraging but based on very small samples; follow-up was partly funded by an egg-industry organisation. Conversely, a trial in 140 women receiving 750mg phosphatidylcholine from the 18th pregnancy week to three months after birth showed no infant cognitive development effect at ten and twelve months.
As with iodine, whose needs also rise during pregnancy (see iodine deficiency), food comes first. Discuss pregnancy supplementation with a midwife or doctor.
Does choline improve adult memory?
Observational data are favourable. In the US Framingham cohort, among 1,391 adults aged 36 to 83, higher choline intake was associated with better verbal and visual memory. But association does not prove effect: people consuming more choline also eat differently.
Trials are disappointing. In three placebo-controlled experiments with 94 young adults in total, 2 to 2.5 g choline bitartrate one hour before tests improved neither working nor long-term memory. NIH notes no clear cognitive improvement from choline supplements in healthy adults. Choline is often combined with huperzine A, without a controlled combination trial; better-proven memory approaches appear in ways to improve memory.
TMAO: should you worry?
Some gut bacteria convert choline to trimethylamine, which the liver converts to TMAO. Among 4,007 patients followed for three years after coronary angiography, those with highest TMAO had 2.5 times more cardiovascular events than those with lowest. This is association, not causation.
Form matters. In a four-week randomised trial, choline bitartrate supplements increased TMAO and platelet reactivity, whereas four eggs daily or phosphatidylcholine supplements providing comparable choline did not.
What is the safety limit?
The reference upper limit is American: 3.5 g choline daily in adults including pregnancy and breastfeeding. It is based on high-dose blood pressure reductions and fishy body odour from trimethylamine. This is far above food intakes and typical supplement doses.
Choline also participates with B6, B9 and B12 in homocysteine metabolism; our vitamin B6 article details this shared role.
Frequently asked questions
Does choline cause weight loss?
No. No robust study shows weight loss from a choline supplement, and no authorised claim permits it. “Lipid metabolism” concerns liver fat transport, not burning fat stores.
Is choline a vitamin?
Not strictly. It is an essential nutrient partly made by the body, often grouped alongside B vitamins. The sometimes-used “vitamin B4” has no official value.
How many eggs meet requirements?
One large egg supplies around 147mg, over a third of adequate adult intake. With meat or fish, dairy and pulses during the day, 400mg is reached without particular difficulty.
Are vegetarians and vegans low in choline?
Plant sources are less concentrated. Without animal foods, reaching 400mg daily requires soy, pulses, quinoa, wheat germ and cabbage-family vegetables. Dietary support can help with highly restrictive diets.
Choline and inositol: what is the value?
A frequent supplement combination. Inositol has no authorised health claim, and we found no trial showing a benefit specific to this combination. Only choline's claims apply under their dose conditions.
What is a “choline PET scan”?
Medical imaging unrelated to nutrition. A tiny amount of labelled choline is injected and strongly taken up by certain cells. It is used notably to locate prostate tumours or overactive parathyroid glands.
Conclusion
Choline is essential with established roles: membranes, liver fat transport, homocysteine and acetylcholine synthesis. A varied diet with eggs, meat, fish, dairy or pulses generally covers 400mg adequate daily intake, but needs rise during pregnancy and breastfeeding. Brain studies remain preliminary and no claim is authorised. Supplemental form matters: compare actual choline supplied and seek healthcare advice during pregnancy.
Sources
- EFSA NDA Panel (2016). Dietary Reference Values for choline. EFSA Journal, 14(8), 4484. doi:10.2903/j.efsa.2016.4484
- National Institutes of Health, Office of Dietary Supplements (2022). Choline: Fact Sheet for Health Professionals (updated 2 June 2022). ods.od.nih.gov
- Commission Regulation (EU) No 432/2012 of 16 May 2012 establishing a list of permitted health claims made on foods, other than those referring to the reduction of disease risk and to children's development and health. Official Journal of the European Union, L 136, 1-40 (consolidated version of 19 August 2024). EUR-Lex
- EFSA NDA Panel (2023). Choline and contribution to normal liver function of the foetus and exclusively breastfed infants: evaluation of a health claim pursuant to Article 14 of Regulation (EC) No 1924/2006. EFSA Journal, 21(7), e08115. doi:10.2903/j.efsa.2023.8115
- Fischer LM et al. (2007). Sex and menopausal status influence human dietary requirements for the nutrient choline. American Journal of Clinical Nutrition, 85(5), 1275-1285. doi:10.1093/ajcn/85.5.1275
- Vennemann FBC et al. (2015). Dietary intake and food sources of choline in European populations. British Journal of Nutrition, 114(12), 2046-2055. doi:10.1017/S0007114515003700
- Commission Implementing Decision 2014/423/EU of 1 July 2014 authorising the placing on the market of citicoline as a novel food ingredient. Official Journal of the European Union, L 196, 24. EUR-Lex
- Caudill MA et al. (2018). Maternal choline supplementation during the third trimester of pregnancy improves infant information processing speed: a randomized, double-blind, controlled feeding study. FASEB Journal, 32(4), 2172-2180. doi:10.1096/fj.201700692RR
- Bahnfleth CL et al. (2022). Prenatal choline supplementation improves child sustained attention: A 7-year follow-up of a randomized controlled feeding trial. FASEB Journal, 36(1), e22054. doi:10.1096/fj.202101217R
- Cheatham CL et al. (2012). Phosphatidylcholine supplementation in pregnant women consuming moderate-choline diets does not enhance infant cognitive function: a randomized, double-blind, placebo-controlled trial. American Journal of Clinical Nutrition, 96(6), 1465-1472. doi:10.3945/ajcn.112.037184
- Poly C et al. (2011). The relation of dietary choline to cognitive performance and white-matter hyperintensity in the Framingham Offspring Cohort. American Journal of Clinical Nutrition, 94(6), 1584-1591. doi:10.3945/ajcn.110.008938
- Lippelt DP et al. (2016). No Acute Effects of Choline Bitartrate Food Supplements on Memory in Healthy, Young, Human Adults. PLoS One, 11(6), e0157714. doi:10.1371/journal.pone.0157714
- Tang WHW et al. (2013). Intestinal microbial metabolism of phosphatidylcholine and cardiovascular risk. New England Journal of Medicine, 368(17), 1575-1584. doi:10.1056/NEJMoa1109400
- Wilcox J et al. (2021). Dietary Choline Supplements, but Not Eggs, Raise Fasting TMAO Levels in Participants with Normal Renal Function: A Randomized Clinical Trial. American Journal of Medicine, 134(9), 1160-1169.e3. doi:10.1016/j.amjmed.2021.03.016
Food supplements do not replace a varied, balanced diet or a healthy lifestyle. Ask a healthcare professional for advice if you are taking medication, pregnant or breastfeeding.
