Choline
Supplements · Nootropics · Supplement, Typed Supps
A building block for the brain chemical behind memory.
Stage by stage
- Intake (Capsule): Absorbed in the small intestine.
- Small intestine (Absorbed): Absorbed in the small intestine.
- Liver & brain (Carried to key tissues): Carried to the liver and brain.
- Brain (Builds acetylcholine): Used to build acetylcholine, a neurotransmitter involved in memory and muscle signalling.
What the evidence supports
- Preventing fatty liver caused by choline deficiency — moderate evidence. Deficiency reliably produces liver fat in controlled feeding studies, and repletion reverses it.
- Supporting foetal brain development — moderate evidence. Enough supporting evidence that several bodies have raised recommended intakes in pregnancy, though intake is commonly below target.
- Improving memory or cognition in healthy adults — limited evidence. Intuitively appealing given its role in acetylcholine synthesis, but the trials in healthy people are unconvincing.
Typical dose
Supplements commonly supply a few hundred milligrams, which is the sensible range given the Adequate Intake — most people are topping up rather than replacing food
Upper limit: 3,500 mg daily for adults. The adverse effect that set the limit is low blood pressure, alongside sweating, diarrhoea and fishy body odour
Timing
With food, standard dosing.
Time to effect
- Weeks: Any noticeable effect, strongest in people with low baseline intake.
Medication interactions
- Anticholinergic medication: No clinically relevant drug interactions are established for choline. In principle large doses push in the opposite direction to anticholinergic drugs, but this has not been documented as a problem in practice. (moderate)
- Methotrexate: Methotrexate disrupts the folate–choline pathway and raises choline requirements; the fatty liver seen with it has been linked to choline depletion. This is a nutrient-depletion effect rather than a hazardous combination — it is a reason to keep intake adequate, not a reason to avoid either. (moderate)
Common myth
“Choline is basically a nootropic drug.” In reality: It’s an essential nutrient most people get from eggs and meat — supplementing mainly matters if diet is genuinely low in it.
Food sources
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