The Truth About the White String in Your Egg

That white, twisted string in a raw egg white is called the chalaza (pronounced kuh-LAY-zuh; plural: chalazae). It is completely natural, safe to eat, and a key indicator of egg quality.

1. What Is the Chalaza?

The chalaza is a twisted strand of natural protein (keratin) that acts as an internal suspension system for the egg.

• Function: It anchors the yolk to the inner lining of the shell, keeping it suspended in the center to prevent it from floating to the edge or breaking.

• Freshness Indicator: Prominent, thick chalazae mean the egg is very fresh. As an egg ages, the chalaza dissolves and grows faint or transparent.

• Fertilization: The chalaza is present in all eggs, both unfertilized commercial eggs and fertilized farm eggs.

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