What is the little white string in egg yoke?

Here's what it does:

* Keeps the yolk centered: The chalaza acts like a spring, helping to keep the yolk in the center of the egg. This ensures that the yolk stays intact even if the egg is jostled or shaken.

* Provides nourishment: The chalaza is rich in protein and other nutrients, which are essential for the developing chick.

Although it may look like a piece of string, the chalaza is a natural part of the egg. It's perfectly safe to eat and adds a bit of texture to your food. If you find it bothersome, you can simply remove it before cooking or eating the egg.