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Place · Level 3
维生素样必需营养素 · 细胞膜 · 乙酰胆碱 · 肝脏脂肪运输 · TMAO 争议
synergy · 2
Choline and betaine are two ends of one methyl ledger. In the liver choline is oxidised to betaine (a one-way step — there's no route back), and betaine hands over its methyl to turn homocysteine back into methionine. Run the other way: short on choline, the liver takes the backup line (PEMT) and builds choline-containing phospholipid itself — burning three methyls per molecule. So 'not eating enough choline' and 'methylation is under strain' are two descriptions of the same thing in the liver.
Choline supplies the BHMT remethylation backup to MTR (B12/folate). Low folate raises choline demand.
cofactor · 2
Choline supports phosphatidylcholine for hepatic VLDL lipid export.
Every phospholipid in your membranes is one head plus two tails: the tails are the fat you ate, and the head is usually choline. Your omega-3 intake sets how fluid the membrane is; choline decides whether the membrane can be built at all — short on either and it doesn't get made properly.
regulates · 1
Alpha-GPC and CDP-choline deliver choline to the brain more precisely, at a price. One thing no form escapes: excess choline is partly converted by gut bacteria to TMA and oxidised in the liver to TMAO, which some studies link to cardiovascular risk — with wide variation between people.