Eggs are very nutritious. They are not just fat (yolk) and protein (white). In fact, they contain a wide array of essential vitamins and minerals. Here is what's in an egg.
A - Good for the skin and growth.
D - Strengthens bones by raising calcium absorption.
Iron - Essential in the creation of red blood cells.
Zinc - Good for enzyme stability and essential in sexual maturation.
Calcium - Most important mineral in the strengthening of bones and teeth
Iodine - Controls thyroid hormones
Selenium - Like Vitamin E, it protects cells from oxidation.
Source : TOI