Approximate dose-response bands. Individual response varies — these are starting points, not prescriptions.
~90% of US adults are below the AI. Liver, methylation, and acetylcholine pathways are affected.
Eggs, beef liver, lecithin, and sunflower seeds are the dietary heavy-hitters.
AI (550 mg) met. Supports phosphatidylcholine, betaine, and acetylcholine synthesis.
Alpha-GPC and CDP-choline forms cross the BBB efficiently for cognitive uses.
Approaching the 3500 mg UL.
Fishy body odor, sweating, hypotension above the UL.
You're at 0% of your choline target. The biggest single-serving sources to top it off:
Essential nutrient (formally recognised in 1998) — required for phosphatidylcholine and sphingomyelin synthesis (membranes), acetylcholine synthesis (neurotransmitter), and as a methyl donor (via betaine). Roughly 90% of US adults fall short of the AI. Egg yolks are by far the most concentrated dietary source.
Choline is phosphorylated to phosphocholine, then incorporated into phosphatidylcholine via the Kennedy pathway. Alternative oxidation to betaine donates a methyl group to homocysteine (BHMT enzyme) — a parallel pathway to the folate/B12 cycle. Choline acetyltransferase converts choline + acetyl-CoA to acetylcholine in cholinergic neurons. Maternal choline supports fetal neural tube and hippocampal development.
Subclinical insufficiency is widespread. Frank deficiency causes hepatic steatosis and muscle damage — established in controlled feeding studies.
UL is 3.5 g/day. Very high doses produce fishy body odour (via gut TMAO precursor), GI upset, hypotension. TMAO/CV-risk hypothesis as with carnitine.
Alpha-GPC and CDP-choline (citicoline) cross the blood-brain barrier most efficiently — preferred for cognitive applications. Phosphatidylcholine (lecithin) is cheaper and adequate for liver and general support. Choline bitartrate is the cheapest but less bioavailable to the brain. For pregnancy, prenatal supplements often under-deliver — check labels (most include only 50–55 mg vs the 450 mg AI).
Free choline is absorbed in proximal small intestine; phosphatidylcholine is hydrolysed in gut to free choline + fatty acids before absorption. Alpha-GPC and CDP-choline are absorbed intact and cross the BBB more readily — explains their cognitive preference.
Liver and brain health are healthspan-central; adequacy is non-negotiable. Pregnancy adequacy has multi-generational neurological effects (offspring lifespan-relevant). The TMAO question keeps the high-dose supplementation case unresolved but food-sourced choline (eggs, lean animal protein) does not have the same CV-risk concern as supplemental carnitine.
Acetylcholine precursor, phosphatidylcholine, methyl donor.
The mechanisms and systems this nutrient feeds. Click any to drill into what runs on it.
★ = load-bearing / primary cofactor. Track these in My Journey.
Whole foods that contribute meaningfully (≥10% DV per 100 g serving). Click any food to see its full nutrient profile and what else it brings to the table.
See all foods high in Choline, ranked →