Pulled deli ham from the fridge and noticed a rainbow-like shine on the slices. Is that normal?

a natural occurrence. However, if you find it off-putting or are unsure about the ham’s freshness, consider using the ham in cooked dishes where the texture and appearance are less noticeable.
For those who remain uneasy, buying thicker cuts of ham or opting for freshly roasted meats that haven’t been processed as extensively might help alleviate concerns. Ultimately, trust your instincts and use your senses to guide you in determining the safety of your food.