Choline is one of those nutrients almost nobody talks about. It is technically classified as essential, the body cannot make enough of it on its own, and most adults fall well below the recommended intake. It is the precursor to acetylcholine, a major neurotransmitter, and it is critical to cell membrane structure and prenatal brain development. In schizophrenia research, choline shows up in two distinct conversations: a prevention conversation about prenatal supplementation, and a more general nutritional conversation about adult intake.
Prenatal choline supplementation has shown intriguing effects on infant brain markers associated with schizophrenia risk, while adult choline intake mostly matters as part of overall brain-friendly nutrition.
What choline does
- Builds acetylcholine, central to attention, memory, and arousal
- Forms phosphatidylcholine, the main building block of cell membranes
- Provides methyl groups for the methylation cycle
- Supports prenatal brain development, particularly hippocampal formation
The prenatal story
The most striking schizophrenia-related work on choline comes from researchers including Robert Freedman at the University of Colorado. In a randomised trial published in the American Journal of Psychiatry (available via PubMed), pregnant women given supplemental choline starting in the second trimester had infants with measurably better P50 sensory gating — an electroencephalographic marker that is reliably abnormal in people with schizophrenia and that reflects how the brain filters out repetitive stimuli.
Subsequent follow-up work suggests that infants whose mothers received choline supplementation showed fewer attentional and behavioural problems in early childhood. This is preliminary, and it does not prove that prenatal choline prevents schizophrenia. But it is one of the few nutrition-and-schizophrenia stories with a credible prevention signal at the biological level.
The American Medical Association in 2017 endorsed the importance of choline as part of prenatal nutrition. Most prenatal vitamins still contain little to no choline, which is why food sources matter more than usual during pregnancy.
The alpha-7 nicotinic receptor link
Choline is also a partial agonist at the alpha-7 nicotinic acetylcholine receptor, a receptor implicated in schizophrenia genetics and in the heavy smoking patterns observed in the disorder. This biological link is one reason researchers continue to be interested in nicotinic and choline-related compounds for schizophrenia. The drug xanomeline-trospium (Cobenfy), recently approved for schizophrenia, also acts on the cholinergic system, though through different receptors.
Adult choline intake
The US Adequate Intake (AI) for choline is 550 mg/day for adult men and 425 mg/day for adult women, with somewhat higher amounts during pregnancy and lactation. National surveys suggest that most US adults consume less than this. Best food sources include:
- Eggs (a single large egg has about 150 mg of choline, mostly in the yolk)
- Beef liver and other organ meats
- Salmon, cod, and other fish
- Chicken
- Soybeans and tofu
- Cruciferous vegetables (broccoli, Brussels sprouts)
For most adults, two whole eggs and a serving of fish or meat in a day is enough to meet the AI without supplementation.
Does adult supplementation help schizophrenia?
The honest answer is: not enough is known. A few small trials have looked at high-dose choline (often as alpha-GPC or CDP-choline) in schizophrenia, with mixed and modest effects on cognition or sensory gating. None of this is at the level where supplementation can be recommended as treatment. Adult choline status is best treated as part of overall nutritional adequacy, not as a targeted therapy.
Cautions
Very high doses of choline (multiple grams per day) can cause low blood pressure, sweating, fishy body odour, and gastrointestinal upset. Supplements should be discussed with your prescriber, particularly if you have liver or kidney disease.
What this means in practice
- If you or a loved one is pregnant, ensure choline intake meets or exceeds the 450 mg/day prenatal AI through eggs, fish, meat, and vegetables — and discuss whether to add a supplement with the obstetrician
- For adults with schizophrenia, focus on getting baseline intake from food rather than chasing supplementation
- Do not treat choline as a treatment for active psychosis — there is no evidence base for that
The bigger picture
Choline is part of a wider picture of maternal and early-life nutrition that may modestly shape schizophrenia risk and severity. It joins folate, omega-3s, and vitamin D in this conversation. None of these is a vaccine against the disorder. Together they are a sensible foundation for any pregnancy, particularly in families where schizophrenia has appeared.
This article is for educational purposes only and is not medical advice, diagnosis, or treatment. Always consult a qualified mental health professional. If you or someone you know is in crisis, call or text 988 in the US, or your local emergency number.