Why are eggs sunny side up yellow? And eggs over easy. The yolk is kind of a darkish pink. Ever notice? And they taste different too. Why would flipping an egg in an already hot pan, where it all eventually cooks IAE make such a chemical difference? What does science have to say?
Egg yolks generally range in color between yellow and orange, cooked or uncooked. Under some conditions, the yolk can have a different appearance. The pink color you observe in the eggs turned while being fried comes from a chemical reaction activated by heat between sulfur naturally occurring in the white and iron naturally occurring in the yolk. You get the same visual result when you poach or baste an egg as when you fry it. Eggs fried over hard often have the appearance of a green ring - again chemical reaction involving heat, iron, and sulfur.
https://www.itv.com/news/london/202...ire-mum-finds-pink-egg-sizzling-in-frying-pan Pink or pearly egg whites indicate spoilage due to Pseudomonas bacteria. Some of these microorganisms, which produce a greenish, fluorescent, water-soluble pigment, are harmful to humans and shouldn't be eaten.
