Linked from
The 9 pages that link to Choline, each with the reason it gives.
AcetylcholineRelated: Choline supplies the molecular backbone for acetylcholine synthesis.
LecithinRelated: Choline is part of phosphatidylcholine, a major component associated with lecithin.
N-alkylationRelated: Its biosynthesis includes sequential methylation of ethanolamine nitrogen.
TrimethylamineRelated: Gut microbes can convert choline into trimethylamine.
TrimethylaminuriaRelated: Gut microbes can convert dietary choline into trimethylamine.