The first time you notice it, the effect can be startling. You peel open a fresh pack of deli ham, expecting the usual pink slices, and instead you catch a flash of shimmering color—greens, purples, even hints of blue dancing across the surface. It can look metallic or artificial, and it’s natural to wonder if something has gone wrong. Has the ham spoiled? Was something added to it? In most cases, the answer is far less alarming than it appears, and the explanation lies in simple science rather than food safety concerns. That rainbow-like shine is caused by the way...
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