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Prenatal choline trial links supplement to higher child IQ and fewer social withdrawal problems

Prenatal choline trial links supplement to higher child IQ and fewer social withdrawal problems

New Capabilities

Largest randomized trial of prenatal choline reports a 7.78-point IQ gap at age 4, though the finding weakens in a sensitivity analysis.

October 20th, 2026: Largest prenatal choline RCT reports IQ gain

Overview

Updated Oct 26

Four-year-olds whose mothers took a daily choline supplement during pregnancy scored about eight points higher on IQ tests and had far fewer social withdrawal problems than children whose mothers got a placebo. The trial, the largest randomized test of prenatal choline, enrolled 206 pregnant women at University of Colorado hospitals and published its results in the American Journal of Obstetrics & Gynecology.

The IQ gap came with caveats. When the researchers excluded 20 women who were given the supplement openly during the pandemic, the confidence interval for the IQ difference included zero, the paper reports. About a third of families were lost by the age-4 behavior ratings, and parents rated their own children's social behavior.

Why it matters

A cheap daily supplement that raises child IQ and social development would change prenatal care, but the IQ finding is fragile.

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Key Indicators

206
Pregnant women randomized
Enrolled at 16 weeks gestation at University of Colorado Hospital prenatal clinics, plus affiliated community hospitals.
7.78 points
Mean Full-Scale IQ advantage at age 4
Supplement group scored 7.78 points higher than placebo group (95% CI 1.88 to 13.7).
24% vs 4%
Children with elevated social withdrawal at age 4
24% in the placebo group versus 4% in the supplement group, per parent ratings.
10 of 54
Supplement-group children scoring above IQ 120
Compared with 2 of 49 in the placebo group (risk ratio 4.54).
1 of 71 vs 10 of 71
Children with clinical-range autism spectrum scores
Exploratory finding: 10 in the placebo group versus 1 in the supplement group (risk ratio 10.0).

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People Involved

RF
Robert Freedman
Senior author of the trial, professor of psychiatry
Professor of psychiatry at University of Colorado Anschutz Medical Campus

Organizations Involved

University of Colorado Anschutz Medical Campus
University of Colorado Anschutz Medical Campus
Academic medical center
Ran the trial and published the results

Academic medical center in Aurora, Colorado, whose prenatal clinics enrolled the trial's 206 women.
AJ
American Journal of Obstetrics & Gynecology
Peer-reviewed medical journal
Published the trial

Peer-reviewed journal covering obstetrics, maternal-fetal medicine, and gynecology.

Timeline

October 2016 October 2026

3 events Latest: October 20th, 2026 · 3 weeks ago

  1. Largest prenatal choline RCT reports IQ gain

    Latest Research

    A randomized trial of 206 pregnancies reports a 7.78-point mean IQ gain and fewer social withdrawal problems at age 4, with no significant adverse effects.

  2. Systematic review finds evidence thin

    Research

    A systematic review of trials and observational studies concludes evidence for prenatal choline benefit is insufficient, calling for a high-quality trial with follow-up beyond early childhood.

  3. Pilot follow-up points to choline benefit

    Research

    Freedman's group reports that children whose mothers took perinatal choline had fewer attention problems and less social withdrawal at 40 months.

Scenarios

1

Obstetric guidelines raise prenatal choline recommendations

Uncertain Resolves by Q2 2028

Discussed by: Study team and advocates of nutritional psychiatry

The trial's authors end by recommending 7,200 mg of phosphatidylcholine or 900 mg of choline daily, beginning early in gestation. If the American College of Obstetricians and Gynecologists (ACOG) or the World Health Organization adopts a higher recommended choline intake for pregnancy, the supplement would move from research finding to ordinary prenatal care. This is the path folic acid took in the 1990s.

2

Independent trial confirms the IQ effect

Uncertain Resolves by End of 2028

Discussed by: The 2025 systematic review authors, who called for a high-quality trial with follow-up beyond early childhood

The current trial carries built-in limits: parents rated children's behavior, about a third of participants dropped out by age 4, and the attention-problems primary outcome missed statistical significance. An independent, adequately powered trial with objective cognitive measures would settle whether the IQ and social-developmental gains are real.

3

Evidence stays inconclusive

Possible Resolves by End of 2028

Discussed by: Systematic review authors skeptical of the existing trials

A second pathway is inaction. If no confirmatory trial is funded, or an updated systematic review again finds the trials too small and inconsistent, the finding stays suggestive rather than policy-changing. This pattern has marked other prenatal nutrient candidates, which never moved past mixed studies.

Historical Context

2 moments from history that rhyme with this story — and how they unfolded.

1991-1998

Folic acid and neural tube defects (1991-1998)

The 1991 MRC Vitamin Study randomized 1,817 women who had previous neural tube defect pregnancies and showed folic acid cut recurrence by 72%. The U.S. began mandating folic acid fortification of enriched grains in 1998, and spina bifida rates fell sharply.

Then

Fortification became national policy within seven years of the trial.

Now

A routinely fortified nutrient now prevents thousands of birth defects a year in the U.S.

Why this matters now

It is the model for moving a prenatal nutrient from randomized trial to population-wide recommendation, the path choline's supporters envision.

October 2016

Freedman group's perinatal choline pilot (2016)

A pilot by the same University of Colorado team gave pregnant women phosphatidylcholine or placebo, then followed the children. At 40 months, parent ratings showed fewer attention problems and less social withdrawal in the supplement group, with the effect tied to CHRNA7 gene variants.

Then

The pilot was small, roughly two dozen children per arm, but pointed the same direction as the new trial.

Now

It established choline's biological mechanism in newborns through cerebral inhibition measurements and laid the groundwork for the larger 2026 trial.

Why this matters now

It is the direct predecessor to the new study, showing the effect appears across two consecutive trials from the same research program.

Sources

(11)
+5
American Journal of Obstetrics & Gynecology Medical Xpress CU Anschutz News PMC / American Journal of Psychiatry ClinicalTrials.gov NPR Medical Today New York Post Psychreg PMC PMC