What Causes the Green Ring on Hard-Boiled Eggs? Explained

If you’ve ever cut into a hard-boiled egg and noticed a greenish-gray ring forming around the yolk, there’s no need to be alarmed. This common occurrence is completely harmless and happens because of a natural chemical reaction during cooking. When eggs are exposed to high temperatures for too long, the iron in the yolk reacts with sulfur in the egg continue reading …