Choline is found in most animal tissues and is a primary component of the neurotransmitter acetylcholine.
Choline is a quaternary amine.
Two forms are available as nutrient and/or dietary
supplements:
choline bitartrate, or (2-hydroxyethyl)
trimethylammonium bitartrate, and
choline chloride, or (2-hydroxyethyl)trimethylammonium chloride.