Rainbow Sheen on Deli Ham? How to Know if It’s Safe or Spoiled

Rainbow Sheen on Deli Ham: Is It Safe or a Sign of Spoilage?

You open a newly bought package of deli ham and pause—there it is. A glossy rainbow shimmer sweeping across the slices, flashing hints of green, blue, and purple. It looks unnatural, almost alarming, and for many people it’s enough to question whether lunch should go straight into the trash.