Is it all right to eat the chalaza of chicken egg?

Yes, it is perfectly fine to eat the chalaza of a chicken egg!

The chalaza, those twisted, rope-like strands you see in an egg, are actually protein filaments that help hold the yolk in place. They are completely edible and contain protein and nutrients just like the rest of the egg.

Some people might find the texture a bit off-putting, but it's harmless and nutritious. You can eat it along with the rest of the egg, or simply remove it if you prefer.