What gives a slice of ham an iridescent sheen? Is this a sign of food spoilage bacteria?
A -The glistening, greenish, rainbowlike color that appears from a cut surface of a ham slice is a sign of oxidation and not necessarily spoilage. When the meat is exposed to oxygen or light, some of the nitrate-modified iron content of the meat undergoes a chemical change that alters the ham’s pigmentation.
