Canned tuna has a printed “best by” date, not a “poisonous after” date. That’s a key difference—manufacturers guarantee peak quality, not sudden spoilage.
Most cans will stay perfectly edible for 2 to 5 years after the pack date if stored in a cool, dry place. Yes, you can probably eat that can you bought during the Obama administration.
But here’s the catch: the tuna doesn’t magically spoil, but it will change texture and flavor over time. Think less “freshly caught” and more “rubber-band-and-tin aftertaste.”
What about the myth of “forever tuna”?
I’ve heard people say canned tuna lasts indefinitely because it’s cooked and sealed. That’s mostly true for safety—commercial canning sterilizes the contents.
But “indefinitely” doesn’t mean “deliciously.” After a decade, the oil or water can break down, and the fish gets mushy or strangely metallic. You won’t die, but you might wish you had.
A fun side note: archaeologists have found 50-year-old canned food that was technically safe. Still, I’d pass on a tuna can older than my vinyl collection.
How Long Canned Tuna Is Good For Once It's Opened
