Also known as: Trimethylethanolamine, Vitamin B4
Choline is an essential nutrient required for neurotransmitter synthesis, cell membrane structure, and methyl group metabolism. Despite its importance, most adults do not meet the adequate intake through diet alone.
Choline is a water-soluble nutrient often grouped with the B-vitamins due to its metabolic functions, though it is not technically classified as a vitamin. It is the precursor to acetylcholine, a neurotransmitter critical for memory, muscle control, and autonomic functions. Choline is also a major component of phosphatidylcholine and sphingomyelin — phospholipids that form the structural backbone of all cell membranes. As a methyl group donor (via its metabolite betaine), choline participates in homocysteine metabolism alongside folate and B12. The liver requires choline for very-low-density lipoprotein (VLDL) synthesis; deficiency leads to hepatic fat accumulation and can progress to non-alcoholic fatty liver disease. The adequate intake is 550 mg/day for men and 425 mg/day for women, but NHANES data show that fewer than 10% of Americans meet these targets through diet alone.
Choline is the precursor to acetylcholine, the neurotransmitter essential for memory consolidation and learning. Higher choline intake is associated with better cognitive performance in observational studies.
Choline is required for VLDL assembly and hepatic lipid export. Controlled depletion studies show that inadequate choline intake causes liver fat accumulation and organ damage within weeks.
With meals, split into 1–2 doses
AI is 550 mg for men and 425 mg for women. Tolerable upper limit is 3.500 mg. Eggs (1 large = 147 mg) are the richest common food source.
Cognitive support with additional neuroprotective benefits
High choline content per gram and athletic performance
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