That thin white strand you sometimes see when cracking an egg is called the Chalaza. It’s a natural part of the egg, made mostly of protein, and it plays an important role in keeping everything in place inside.

Its main job is to hold the yolk centered within the egg white. Think of it like a soft anchor or support system that prevents the yolk from moving around too much or bumping into the shell. This helps protect the yolk and maintain the egg’s internal structure, especially when it’s being handled or transported.

Most eggs actually contain two chalazae—one on each side of the yolk—although you might only notice one when you crack the egg open. The more visible and firm the strand is, the fresher the egg usually is, since it tends to weaken and become less noticeable over time.

It’s completely safe to eat and doesn’t affect the taste or quality of the egg. In fact, seeing a prominent chalaza is often a good sign that your egg is fresh and still in great condition for cooking or baking.