Although your body can manufacture choline, it is also necessary to obtain choline through your diet in order to get the amount your body needs to function optimally. Choline plays an important role during the early years of child development. It is used in the synthesis of key components necessary for healthy cell membranes called phospholipids. Choline is also involved in the formation of neurotransmitters, which are important for proper brain and muscle function. Choline is found in foods such as milk, eggs, liver, shrimp and peanuts. Children who do not consume milk or eggs, who have a peanut or shellfish allergy, or who are vegetarian may have inadequate levels of Choline.