Short answer. Choline is an essential nutrient the body uses to build cell membranes, make the messenger acetylcholine and move fat out of the liver. Adults need 425 to 550 mg a day (NIH Office of Dietary Supplements), yet only about 11% of Americans reach that from food (PMID 26886842). Eggs, meat, fish and soybeans are the richest sources.
Choline forms at a glance
| Form | What it is | What the research shows |
|---|---|---|
| Choline in food | About half is phosphatidylcholine; the rest is free choline and related compounds | 4 large eggs a day for 4 weeks did not raise TMAO (PMID 33872583) |
| Choline bitartrate or citrate | A simple water-soluble salt of choline | Raises blood choline quickly; also raised TMAO in two trials (PMID 34287673, 33872583) |
| Phosphatidylcholine (PC) | The main phospholipid of cell membranes, made from sunflower, soy or egg lecithin | Same blood choline exposure as the salts, with a later peak at about 3 hours and no TMAO rise (PMID 34287673) |
| Lecithin | A mix of phospholipids in which PC is one part | A common food emulsifier; ODS lists it as a supplement form |
| Alpha-GPC | Glycerophosphocholine, a water-soluble choline compound | Same blood choline exposure as the other forms in a 6-person crossover; raised TMAO (PMID 34287673) |
| Citicoline (CDP-choline) | A building block the body uses to make PC | 500 mg a day for 12 weeks in older adults; memory results below (PMID 33978188) |
Source: NIH Office of Dietary Supplements and the PubMed abstracts listed under Sources. NIH notes that no study has compared how well choline is absorbed from bitartrate, PC and lecithin.
What does choline do in the body?
Choline has several jobs. The body uses it to make phosphatidylcholine and sphingomyelin, two fats that form the structure of every cell membrane. It is needed to make acetylcholine, a messenger involved in memory, mood, muscle control and other nervous system functions. It is also a source of methyl groups, small chemical units that many steps of metabolism depend on, and it helps carry fat out of the liver (NIH ODS).
The liver makes some choline on its own, mostly as phosphatidylcholine, but not enough to cover the body's needs. That is why choline counts as an essential nutrient that has to come partly from food. Choline and folate share the methyl-group work: when the diet is low in folate, the need for dietary choline goes up (NIH ODS).
How much choline do kids and adults need?
There is not enough data to set an RDA for choline, so the US uses Adequate Intakes. These were set at the levels needed to keep the liver working normally, measured by a liver enzyme in the blood (NIH ODS).
| Age | Adequate Intake (AI) | Upper limit (UL) |
|---|---|---|
| 0–6 months | 125 mg | Not established |
| 7–12 months | 150 mg | Not established |
| 1–3 years | 200 mg | 1,000 mg |
| 4–8 years | 250 mg | 1,000 mg |
| 9–13 years | 375 mg | 2,000 mg |
| 14–18 years | Boys 550 mg, girls 400 mg | 3,000 mg |
| Adults 19 and older | Men 550 mg, women 425 mg | 3,500 mg |
| Pregnancy | 450 mg | 3,000 mg (14–18), 3,500 mg (19+) |
| Breastfeeding | 550 mg | 3,000 mg (14–18), 3,500 mg (19+) |
Source: NIH Office of Dietary Supplements (choline fact sheet), based on the Institute of Medicine Dietary Reference Intakes. For infants, breast milk, formula and food should be the only sources. The Daily Value on supplement labels is 550 mg for adults and children 4 and older.
The AI is an average guide, not an exact need. In a controlled feeding study of 57 adults, a very low-choline diet led to signs of fatty liver or muscle damage in 77% of men and 80% of postmenopausal women, but in only 44% of premenopausal women. Six men showed these signs even at the AI level, and normal function came back once choline was added to the diet again (PMID 17490963). NIH notes that estrogen switches on the gene the body uses to make choline, which may be why younger women needed less from food in this study.
Can you get enough choline from food?
Many people do not. In US national survey data for 2009 to 2012, covering 16,809 people aged 2 and older, only 10.8% met the AI, including 15.6% of males and 6.1% of females. Young children did best: 62.9% of children aged 2 to 3 and 45.4% of children aged 4 to 8 met it, compared with 9.0% at ages 9 to 13, 1.8% of teenagers and 6.6% of adults (PMID 26886842). The newer 2013 to 2014 survey found average intakes from food of 256 mg in children and teens, 402 mg in men and 278 mg in women (NIH ODS).
The richest foods are animal products. Per NIH, 3 ounces of pan-fried beef liver has 356 mg, one large hard-boiled egg 147 mg, 3 ounces of beef top round 117 mg, half a cup of roasted soybeans 107 mg, and 3 ounces of chicken breast 72 mg. Plant foods add smaller amounts: a large baked red potato has 57 mg, half a cup of kidney beans 45 mg, a cup of cooked quinoa 43 mg, and half a cup of broccoli 31 mg. Families who rarely eat eggs or meat may find it harder to reach the AI, which is a good reason to look at the diet with a dietitian or doctor.
Who is most likely to run low on choline?
- Pregnant and breastfeeding women. The AI rises to 450 mg in pregnancy and 550 mg while breastfeeding, yet about 90% to 95% of pregnant women take in less than the AI, and prenatal vitamins usually contain little or no choline (NIH ODS). When researchers tested 47 prenatal multivitamins, only 12 listed choline on the label, and 5 of those 12 held more than 20% less than claimed (PMID 40252729). A small feeding trial gave 26 women 480 or 930 mg a day in the third trimester and followed their children (PMID 29217669, 34962672), but it was tiny and partly funded by egg and beef groups, so any prenatal choline plan belongs with the obstetrician or midwife.
- People with certain gene variants. In a feeding study of 57 adults on a low-choline diet, 18 of 23 people (78%) carrying one common variant of the PEMT gene, which the body uses to make choline, developed signs of low choline (PMID 16816108).
- Men and women after menopause, who in the feeding study were more likely to show signs on a low-choline diet (PMID 17490963).
- People on long-term intravenous nutrition, because choline is not routinely added to these solutions (NIH ODS).
Choline is not routinely measured in healthy people, and frank deficiency in healthy men and women who are not pregnant is very rare (NIH ODS). Muscle or liver changes are reasons to get tested and talk with a doctor.
Which form of choline is best: bitartrate, phosphatidylcholine or alpha-GPC?
For simply raising choline intake, the forms look similar. In a randomized crossover study, 6 healthy men took a single 550 mg choline dose as choline chloride, choline bitartrate, alpha-GPC and egg phosphatidylcholine, at least a week apart. Total blood choline over the 6 hours of blood sampling did not differ between the forms, and all raised betaine, the compound choline turns into when it donates methyl groups. Phosphatidylcholine peaked later, at about 3 hours (PMID 34287673).
The main difference was TMAO, a compound gut bacteria and the liver make from choline that has been linked to heart health risk. All the water-soluble forms raised TMAO quickly, while egg phosphatidylcholine did not (PMID 34287673). A 4-week randomized trial in healthy young adults found the same pattern: TMAO rose in all three groups taking choline bitartrate, but not in people eating 4 large eggs a day or taking phosphatidylcholine supplements (PMID 33872583). Both studies were small, and what a short-term TMAO rise means for an individual is still unclear. People with heart concerns can raise this with their cardiologist.
Phosphatidylcholine is often made from sunflower lecithin, which matters to families who avoid soy; alpha-GPC is often made from soy.
Does choline help memory and focus?
Choline supports normal nerve signaling, since acetylcholine is made from it. Whether extra choline improves thinking in healthy people is less certain. A 2015 systematic review of 50 articles found that choline may have benefits for thinking in adults, but high-quality trials were lacking (PMID 26108618), and NIH notes that choline supplements did not clearly improve cognition in healthy adults.
Citicoline has one of the better trials. In a 12-week double-blind study of 100 healthy adults aged 50 to 85 who had noticed age-related memory changes, 500 mg a day improved episodic memory scores more than placebo (0.15 vs 0.06), and a combined memory score rose 3.78 points vs 0.72 (PMID 33978188). These were secondary outcomes, and the study was run by the company that makes the citicoline ingredient.
Can you take too much choline, and does it interact with medicines?
Yes, too much is possible. High intakes are linked to a fishy body odor, vomiting, heavy sweating and salivation, low blood pressure and liver toxicity. The upper limits in the table above are based on low blood pressure and fishy body odor, and they do not apply to people taking high doses under medical supervision (NIH ODS). Typical supplements contain 10 to 250 mg, well below these limits.
NIH reports that choline is not known to have any clinically relevant interactions with medicines. It is still wise to tell your doctor and pharmacist about every supplement you take, especially combination formulas that contain herbs.
Which ASDHelp products contain choline?
Doses are copied from each label. Every serving below is far under the upper limit for any age from 1 year up; if you use more than one, add up the total along with food.
- SF Lecithin Phospholipids: 10 g of sunflower lecithin powder per scoop, with a typical 2.5 g of phosphatidylcholine per 10 g. Label directions: 1 scoop a day with a meal; no children's dose; if pregnant or nursing, ask the physician first.
- Formula C: 75 mg of choline (as bitartrate) per 6 capsules, in a broad multivitamin and mineral formula. Label directions: 6 capsules daily with food; check the label's age directions with the pediatrician before giving it to a child.
- Spectrum B Complex + Benfotiamine: 30 mg of choline (as choline dihydrogen citrate) per capsule, with the B vitamins. Label directions: 1 capsule once or twice daily; no children's dose.
- Neuro: 50 mg of choline (as alpha-GPC) per 2 tablets, with phosphatidylserine, amino acids and herbal extracts including ginkgo and ashwagandha. Contains soy. Label directions: 2 tablets daily with food; no children's dose.
- Spectrum BDNF Support Powder: 120 mg of choline (as alpha-GPC) per level scoop, with phosphatidylserine and acetyl-L-carnitine. Contains soy. Label directions: adults, 1 scoop once or twice daily; children only as directed by a healthcare professional.
Related reading: phosphatidylserine, alpha-GPC, folate and vitamin B12, which share the methyl-group work with choline.
Questions to take to your doctor
- Based on what we eat, are we likely to fall short of the choline AI, and would food changes be enough?
- Is it worth checking liver enzymes or other labs before deciding on a supplement?
- If a supplement makes sense, which form suits us, and what daily total from all products and food is right?
- For pregnancy or for a child, what amount fits, and does the prenatal vitamin already contain choline?
Sources
- NIH Office of Dietary Supplements. Choline fact sheet for health professionals. ods.od.nih.gov/factsheets/Choline-HealthProfessional
- National Academies. Dietary Reference Intakes summary tables (NCBI Bookshelf). ncbi.nlm.nih.gov/books/NBK545442
- Wallace TC, Fulgoni VL 3rd. Assessment of total choline intakes in the United States. J Am Coll Nutr 2016. PMID 26886842
- Fischer LM et al. Sex and menopausal status influence human dietary requirements for the nutrient choline. Am J Clin Nutr 2007. PMID 17490963
- da Costa KA et al. Common genetic polymorphisms affect the human requirement for the nutrient choline. FASEB J 2006. PMID 16816108
- Böckmann KA et al. Differential metabolism of choline supplements in adult volunteers. Eur J Nutr 2022. PMID 34287673
- Wilcox J et al. Dietary choline supplements, but not eggs, raise fasting TMAO levels in participants with normal renal function: a randomized clinical trial. Am J Med 2021. PMID 33872583
- Leermakers ET et al. Effects of choline on health across the life course: a systematic review. Nutr Rev 2015. PMID 26108618
- Nakazaki E et al. Citicoline and memory function in healthy older adults: a randomized, double-blind, placebo-controlled clinical trial. J Nutr 2021. PMID 33978188
- Caudill MA et al. Maternal choline supplementation during the third trimester of pregnancy improves infant information processing speed. FASEB J 2018. PMID 29217669
- Bahnfleth CL et al. Prenatal choline supplementation improves child sustained attention: a 7-year follow-up of a randomized controlled feeding trial. FASEB J 2022. PMID 34962672
- Borgelt LM et al. Content of selected nutrients and heavy metals in prenatal multivitamins and minerals: an observational study. Am J Clin Nutr 2025. PMID 40252729
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure or prevent any disease. This article is educational and is not medical advice.