Eggs are an inexpensive and easy source of protein. People often think eggs whites are a healthier option than whole eggs because they contain less fat, and while it’s true that the egg yolk contains some fat, it’s also packed with important nutrients. One whole egg contains 5 grams of fat, but only 1.5 grams are saturated. Whole eggs are also a good source of choline (one egg yolk has about 300 micrograms of choline), an important B vitamin that helps regulate the brain, nervous system and cardiovascular system. And while there’s a lot of buzz about the cholesterol in eggs, research has linked moderate egg consumption to improved heart health.