Group of eggs, one egg has a smiley face drawn on it. - stock photo

Horizontal photo of a group of seven eggs lying down on a paper towel. One of the eggs in the lower right hand corner has a smiley face drawn on its' shell. Eggs contain several vitamins and minerals that are essential parts of a healthy diet. Some vitamins and minerals in eggs help promote healthy skin, preventing the breakdown of body tissues, including muscle tissues. Eating eggs also lowers the risk of heart disease by breaking down homocysteine. The selenium in eggs helps with a healthy immune system.