Phosphatidylcholine

PC · lecithin · 1,2-diacyl-sn-glycero-3-phosphocholine

Snapshot

Indications	Contraindications
Ulcerative colitis¹ Nonalcoholic fatty liver disease² Verbal memory³ Bipolar disorder mood symptoms⁴	Soy allergy⁵ Fish allergy⁵

Phosphatidylcholine is the primary membrane lipid and the major component of lecithin³. It supplies choline for membrane integrity and for acetylcholine, a messenger involved in learning and memory³. Uses that follow include ulcerative colitis, nonalcoholic fatty liver disease, memory in older adults, and mood stability in bipolar disorder.

A meta-analysis of randomized trials of delayed-release lecithin in ulcerative colitis found better remission and clinical and endoscopic outcomes than placebo, while a trial of a higher-purity preparation failed¹. In fatty liver disease, adding liraglutide to polyene phosphatidylcholine lowered liver enzymes more than polyene phosphatidylcholine alone². Short trials in Alzheimer disease show no cognitive benefit, and a company-sponsored trial of egg-derived product found only a small gain in verbal memory in older adults³. A 2026 narrative review reported that lipid-soluble choline forms, including phosphatidylcholine, support gut barrier and immune signaling, though human trials remain limited⁶. Products listing phosphatidylcholine come mostly as softgels, liquids, capsules, and powders; see Form comparison.

Ten of 30 sampled product labels declare soy, so allergy to the source material is the practical concern⁵. Five of 30 labels tell patients planning surgery to consult a doctor first⁵.

Last updated October 16, 2026. Read how we make monographs.

In the full monograph

46 sources, 37 studies

When to useThe situations practitioners use it for, each with the reason and the study behind it.
SafetyWho should avoid it, who needs extra care, and the side effects reported in studies.
InteractionsThe medicines and supplements it interacts with, the effect of each, and what labeling says to watch.
Protocol notesThe doses used in studies, how and when they were taken, and how the forms on the market compare.
How it worksWhat it is and how it works in the body, in plain terms.
Published studiesThe studies behind each use, popular claims checked against them, and trials still under way.
Word of mouthWhat patients and practitioners report online, kept separate from the clinical evidence.
Clinical perspectiveA closing read of where the evidence is solid, where it is thin, and what has not been studied.

Snapshot

In the full monograph

Sources