If you eat egg white, you have to eat egg yolk. It's okay to eat an egg yolk a day, but don't eat too much. The yolk is the core of an egg. In fact, the fertilized egg of an egg is near the junction of yolk and protein, and yolk is also a part of nutrients in the egg. The main minerals, vitamins and phospholipids in eggs are all in the yolk. Seek to adopt all the knowledge you know (manually)