Why Does Deli Meat Sometimes Have a Rainbow Shine

under bright lighting.

Is Rainbow-Colored Meat Safe to Eat?
Yes.

If the meat is otherwise fresh, the rainbow sheen is completely harmless.

It does not:

Affect taste
Change texture
Alter nutritional value
Indicate bacterial contamination
Many food safety experts consider it a purely cosmetic effect.

So if your roast beef or ham has a colorful shimmer but smells normal and has been stored properly, there’s no reason to throw it away.

When Should You Actually Be Concerned?
When Should You Actually Be Concerned?

While the rainbow effect itself isn’t a