Choline

Glossary / Nootropics / Choline
NOOTROPICS · GLOSSARY ENTRY

Choline

A precursor to the neurotransmitter acetylcholine — essential nutrient and the standard pairing for racetam stacks.

Why it matters

Choline is required for the synthesis of acetylcholine, a neurotransmitter involved in memory, attention, and muscle control. Dietary sources include eggs, liver, and soybeans. Many people consume below the adequate intake (around 425mg for women, 550mg for men). Supplementation forms include choline bitartrate, alpha-GPC, CDP-choline (citicoline), and lecithin.

In practice

The most relevant forms for cognitive use are alpha-GPC and CDP-choline because they cross the blood-brain barrier efficiently. Bitartrate is cheaper but less bioavailable to the brain. Racetam users typically add 300–600mg of alpha-GPC or CDP-choline to head off headache from increased cholinergic activity.

Common confusion

“More choline = better cognition” is wrong — excess can produce side effects (depression, GI upset) and the dose-response is non-linear.

This glossary entry is editorial content reviewed against primary sources. It is not medical advice. See our Editorial Policy.

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