tastier.
What causes the green ring?
The green (sometimes grayish) ring around the egg yolk is the iron in yolk and the result of a natural chemical reaction in protein. When the egg is cooked for too long or needs to be exposed to high heat, these elements merge and form iron(II) sulfide – a compound that is responsible for the formation of a greenish ring.
Although the color may not be very appetizing, egg consumption is completely safe; it is simply less showing.
The real culprit: overcooking.
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