Phosphatidylcholine (Pc) is a phospholipid with a choline molecule attached, and is the most common form of choline found in foods. Choline is defined as an essential nutrient by the Fda, yet between 80% - 90% of Americans currently don t get enough through their diet.Choline is used by the body to produce the neurotransmitter acetylcholine, which plays a key role in supporting many cognitive processes including memory, fluid intelligence, and mood.