Children whose mothers took high doses of phosphatidylcholine during pregnancy scored higher on preschool IQ tests and exhibited fewer social withdrawal behaviors at age four, according to findings published by researchers at the University of Colorado (New York Post). The randomized clinical trial investigated whether supplementing a standard diet and prenatal vitamins with extra choline could influence early cognitive and behavioral development.
The study involved more than 200 pregnant women recruited through University of Colorado prenatal clinics and affiliated hospitals, as reported by Earth.com. Beginning at 16 weeks of pregnancy and continuing until delivery, participants were randomly assigned to receive either phosphatidylcholine supplements or a matching placebo. Neither the participants nor the researchers knew group allocations until the final assessments were completed when the children reached age four.
Cognitive Performance and IQ Differences
At age four, participating children completed standardized preschool IQ tests. Children in the choline supplementation group achieved an average score of 106, compared to an average of 98 in the placebo group. Researchers noted that the performance gap was particularly evident in working memory and visual-spatial skills, which help children remember instructions and navigate shape recognition or puzzle tasks.
Senior author Robert Freedman noted that the dosage used in the trial was high, involving approximately 9,000 milligrams of phosphatidylcholine daily delivered through ten large capsules. The researchers suggest that a slightly lower intake of 7,200 mg of phosphatidylcholine, or 900 mg of pure choline, might achieve similar developmental support.
Social Development and Behavioral Markers
In addition to cognitive testing, the trial tracked social development through parent-completed behavior checklists administered between 18 months and four years of age. The evaluation focused on indicators of social withdrawal, such as limited eye contact, reduced interest in interacting with others, and withdrawal from group activities.
By age four, only 4% of children in the supplement group exhibited lasting or multiple social withdrawal problems, compared to 24% of children in the placebo group. Researchers also observed fewer behavioral profiles and language difficulties associated with autism spectrum conditions among the supplement group. However, attention problems showed no notable improvements across the cohorts.
Biological Mechanisms and Study Limitations
Choline is a nutrient naturally found in everyday foods such as eggs, beef, chicken, and fish, and it plays a critical role in cellular health, memory, and nerve cell communication. According to the study authors, choline helps activate receptors formed by the CHRNA7 gene in developing nerve cells before birth, allowing them to properly receive signals from other neurons. Researchers emphasized that getting enough choline for complete receptor activation is nearly impossible through diet alone during pregnancy.
Despite the positive outcomes, the study faced a notable participant drop-out rate, with approximately one-third of the original cohort withdrawing before the final evaluations at age four. Furthermore, the social behavior metrics relied on parent-completed checklists rather than independent clinical assessments, a factor that researchers acknowledge as a methodological limitation when interpreting behavioral outcomes.