Here’s the golden rule you can tattoo on your fridge magnet: opened canned tuna lasts 3 to 4 days in the fridge. That’s the official word from the USDA, and they’re pretty much the superheroes of food safety.
Wait, you’re thinking—only three or four days? Yes, but don’t panic. That’s three to four glorious days of last-minute lunches, midnight snacks, and emergency pasta stir-ins. Think of it as a window, not a deadline.
Why Not Longer? (And Why You Shouldn’t Cry About It)
Tuna is cooked during canning, but once you open that lid, the air introduces bacteria that love protein. Refrigeration slows them down, but it doesn’t stop them completely—so after day four, the tuna starts to lose its charm.
But here’s the fun part: you can totally work with that window. Three days is plenty of time to turn tuna into a hero ingredient. Tuna salad on Monday, tuna-stuffed avocado on Tuesday, tuna melt on Wednesday. See? You’re already winning.
