Once thought to be unhealthy, the egg yolk has made a real comeback. Unless you have high cholesterol you should be eating the yolks of eggs! First of all they are delicious and nutritious. Egg yolks contain vitamins A, E, K and the coveted popular vitamin D! Very good for skin and hair, these yellow little treats are great in a variety of dishes. A Eat Smart Age Smart fun tip for dog owners, mix in raw egg yolk into your dog’s food for a healthy shiny coat.