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Choline
Precursor to acetylcholine and phosphatidylcholine — critical for memory, liver function, and cell membrane integrity.
What the evidence says
Studies are split: Choline helped in 5 of 11 cases, with the rest inconclusive or showing no benefit.
Most evidence is from high-quality meta-analyses and randomised trials published 2005–2026 with a typical study size of 1,200 participants.
Based on 32 studies · 12 meta-analyses · 11 RCTs · 916,515 total participants
Confidence
HighWhat the studies found
By outcome
See full supplement plans that include Choline.
Choline has an evidence score of 9/10 — very strong evidence based on 32 indexed studies, including 21 meta-analyses. Precursor to acetylcholine and phosphatidylcholine — critical for memory, liver function, and cell membrane integrity.
The commonly studied dose of Choline is 250-500mg daily (varies by form). Research points to an estimated optimal dose around 500mg, with a minimum effective dose near 250mg. Individual response varies — start low and adjust.
The best time to take Choline is in the morning. Taking it with food is preferred. Choline supports acetylcholine synthesis, phosphatidylcholine membrane production, and methylation via the betaine pathway.
Vitamin B12
Likely helpsDrives nerve myelination, red blood cell formation, and DNA synthesis — deficiency is common in vegans, vegetarians, and older adults.
B-Complex
Probably helpsEssential B vitamins in their active methylated forms, supporting energy production, mood, and cognitive function.
Last reviewed May 2026 · evidence from 39 studies · how we score
This information is for educational purposes only. It is not a substitute for professional medical advice. Always consult a qualified healthcare provider before starting, stopping, or changing any supplement or medication.
Choline is an essential nutrient similar to B vitamins, required for neurotransmitter synthesis (acetylcholine), cell membrane structure (phosphatidylcholine), and liver function (lipid transport). Most people don't get enough choline from diet alone. It's particularly important for cognitive function, as acetylcholine is crucial for memory and learning. Different forms (Alpha-GPC, CDP-Choline, choline bitartrate) have varying effects and bioavailability.
Precursor to the memory and learning neurotransmitter
Component of phospholipids that form cell membranes
Donates methyl groups via betaine pathway
How Choline works — from molecular targets to health outcomes. Click an edge to see supporting research.This visualization is in beta — pathways are being refined and expanded.
Tap node to isolate • Pinch to zoom • Tap edge for research
250-500mg daily (varies by form)
Loading: Not required; choose dose based on dietary intake
Take with food
| Form | Type |
|---|---|
| 💊Alpha-GPC or CDP-Choline (Citicoline) | Recommended |
| 💊Choline Bitartrate | Alternative |
| 💊Phosphatidylcholine | Alternative |
| 💊Lecithin | Alternative |
Alpha-GPC: 40% choline, best for cognition. CDP-Choline: Also provides cytidine for brain health. Bitartrate: Cheapest, good for basic needs. Lecithin: Food-based, lower choline content.
Minimum: 2 weeks
Optimal: 8 weeks
Cycling: Not required
Note: Different forms have different optimal uses: Alpha-GPC for cognitive enhancement, CDP-Choline for neuroprotection, choline bitartrate for basic choline needs.
You can get choline from these foods and drinks. Doses are typical per-serving estimates — actual content varies by brand, brew, cooking, etc.
600 mg per 2 pieces
2 large egg yolks. Pasture-raised hens produce 3–4× more vitamin D. Whole eggs (white + yolk) add ~12 g protein.
1050 mg per 3 ozs
3 oz cooked. Preformed retinol (no conversion needed). Don't exceed 1 serving/week if pregnant — vitamin A toxicity risk.
Based on meta-analysis of α-GPC with donepezil showing cognitive benefits and citicoline studies. Effects vary significantly by choline form - α-GPC and CDP-choline show higher bioavailability. Most evidence is in older adults or those with existing cognitive impairment.
Better recall and working memory
Healthy fat metabolism and liver function
Clearer thinking and focus
High doses may cause trimethylaminuria-like odor
Important nutrient; 450-550mg/day recommended during pregnancy
May support cognitive function; consider Alpha-GPC or CDP-Choline
May enhance cholinergic effects
May reduce effectiveness of either
Tip: Reduce dose; affects some individuals more
Tip: Take with food
Tip: May indicate cholinergic excess; reduce dose
Choline is generally well-tolerated and considered safe for most healthy adults at recommended doses. The most commonly reported side effects are fishy body odor, GI upset, headache. Use caution if any of these apply to you: Trimethylaminuria (fish odor syndrome).
Methylfolate
Likely helpsBioactive folate that bypasses MTHFR conversion — critical for the 30-40% of people with gene variants affecting mood and methylation.