The average American consumes 277 eggs per year, so you’ve probably thought about the dozens of different ways to cook them, from scrambling to poaching, but you probably haven’t given much thought to the white stringy thing attached to your egg yolk. Maybe you never even noticed it, but if you have, you can’t unsee it. So, what is it exactly?
Contrary to popular belief, that white thing floating in raw eggs is not a baby chicken’s umbilical cord. It’s not an embryo, either. It’s a chalaza—pronounced cuh-LAY-zuh—and it’s totally normal and safe to eat.
What Is a Chalaza?
If you study the anatomy of an egg, you will notice two twisted strands on both sides of the yolk connected to the inside of the eggshell—and that’s what you’re looking at when you see those white stringy bits. The chalazae (plural) are rope-like structures made of protein that keep the yolk suspended in the center of the egg so it doesn’t press against the shell or settle on one side of the egg.
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Is It Safe to Eat Chalaza?
When cracking an egg, there’s really no need to remove the chalazae. They’re safe to eat, and once cooked, they disappear. They won’t interfere with cooking,unless you’re whipping up custard or curd, in which case the eggs should be strained for an extra smooth texture. Simply pass them through a strainer or use your fork to pick out the chalazae.
Sure, it looks weird, but you should actually appreciate the chalaza: It’s a sign that an egg is fresh and safe to eat. The visibility of chalazae makes it easy to test the freshness of eggs. The more prominent the string is, the fresher the egg. Chalazae tend to disappear as an egg ages, so if you don’t see at least one string in your raw egg, it’s likely growing stale. More chalazae, fewer problems, really.
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