Choline is an organic compound that is classified as a water-soluble essential nutrient and is usually grouped within the Vitamin B complex family. It is found that getting enough choline can reduce the chances of getting breast cancer by 24 percent. It also reduces the risk of heart disease and improves memory. Choline can be found in eggs, fish, lean meat, collard greens, and beans. It is recommended that women get 425 mg of choline each day.