a single yolk divides. Double-yolk eggs are completely safe and considered lucky in some cultures.
Greenish or dark eggs. This is not a sign of spoilage. It’s often due to the hen’s diet or the presence of a rare pigment called oocyanin. The eggs are safe to eat.
A ring around the yolk after hard-boiling. This happens when eggs are overcooked. The greenish-gray ring is a chemical reaction between the iron in the yolk and the sulfur in the egg white. It’s harmless but not very attractive.
What About Parasites
