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

and texture. These additives can alter the refractive properties of the  meat, making the iridescent effect more pronounced.
The curing process itself, which involves the use of salt and nitrates, can also impact the meat’s surface structure, further enhancing light diffraction. Hams that are cured and smoked tend to have a more noticeable iridescent sheen due to the changes in their muscle fiber structure.

Proper storage is crucial in preventing harmless iridescence from turning into spoilage.  Deli ham should always be