Eggs are a brain food, as they are one of the richest sources of choline, needed for healthy brain development and function. The yolk from a medium sized egg contains around 300mg of choline.
Most of the choline we need comes from our diet. It is used by the body to form the neurotransmitter acetylcholine, involved in memory function.
Low levels of choline can lead to a deficiency in folic acid, also important for a healthy brain. Choline plays an important role in the brain development of the unborn child and also helps prevent birth defects."