Why Is My Egg Black Inside?

Black or green spots inside the egg may be the result of bacterial or fungal contamination of the egg. If you come across an egg with black or green spots discard the egg. Off color egg whites, such as green or iridescent colors may be from spoilage due to bacteria.

What if egg yolk is black?

The discoloration that sometimes forms around the yolk of hard-boiled eggs is the result of a reaction between sulfur in the whites and iron in the yolks. It is harmless. It occurs when eggs have been cooked for too long or at too high a temperature.

Can you eat a black egg?

The black eggs, commonly called Kuro-Tamago by the locals, are perfectly safe, although they may smell like sulfur. In fact, eating them is believed to add a few years to your life span – on average, five to seven years!