What it does in the body
- Acetylcholine synthesis (neurotransmission, memory, muscle control)
- Phosphatidylcholine synthesis (cell membrane structural integrity)
- VLDL assembly and hepatic lipid export (prevents fatty liver)
- Methyl group donor via betaine (homocysteine remethylation, parallel to folate pathway)
- Fetal brain development (hippocampal neurogenesis and synaptogenesis)
How much you need (Daily Value)
| Group | Recommended | Source |
|---|---|---|
| Adult male | 550 mg (AI) | NIH/IOM |
| Adult female | 425 mg (AI) | NIH/IOM |
| Pregnancy | 450 mg | WHO/IOM |
| Children | 200-375 mg (ages 1-13) | IOM |
| Older adults | 550 mg (male), 425 mg (female) | NIH |
Richest food sources
| Food | Amount | Where |
|---|---|---|
| Beef liver | 418 mg per 100g | global |
| Eggs (whole) | 294 mg per 100g (concentrated in yolk) | global |
| Soybeans (roasted) | 107 mg per 100g | East Asia |
| Chicken breast | 85 mg per 100g | global |
| Salmon | 91 mg per 100g | global |
| Cauliflower | 39 mg per 100g | global |
| Peanuts | 52 mg per 100g | Americas/Africa |
| Quinoa (cooked) | 23 mg per 100g | South America |
If you don't get enough
Mild: Elevated liver enzymes, subclinical fatty liver, suboptimal homocysteine metabolism
Moderate: Nonalcoholic fatty liver disease (NAFLD), muscle damage (elevated CPK), cognitive decline
Severe: Severe hepatic steatosis progressing to steatohepatitis, liver failure on TPN without choline, neural tube defects (synergistic with folate deficiency)
Time to onset: Hepatic steatosis develops within weeks on a choline-depleted diet in controlled studies
Too much
Upper limit: 3500 mg/day for adults
Fishy body odor (trimethylamine), hypotension, excessive sweating, GI distress, hepatotoxicity at very high doses. Elevated TMAO (trimethylamine N-oxide) linked to cardiovascular risk.
How well you absorb it
Well absorbed in the small intestine via carrier-mediated transport; phosphatidylcholine from foods requires pancreatic phospholipase A2 for release
Helped by: Adequate pancreatic enzyme function, Normal gut flora (metabolize some choline to betaine)
Hindered by: PEMT gene polymorphisms (reduce endogenous synthesis, increasing dietary requirement), Postmenopausal estrogen decline (estrogen upregulates endogenous choline synthesis)
Cooking & storage
Choline is relatively heat-stable. Phosphatidylcholine in eggs and meats is preserved during normal cooking. Some loss occurs during prolonged boiling as free choline leaches into water.
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