How Long Is Canned Tuna Good For
著者: 伊藤 翔太
If your kitchen hits 85°F in the summer (hello, my fellow apartment dwellers), that tuna’s shelf life shrinks drastically. Heat speeds up chemical reactions that break down the fish.
A cool basement or pantry at 50-70°F is your best friend here. Don’t stash it above the stove or near the water heater—that’s a ticket to “maybe I’ll order pizza instead” territory.
And please, for the love of quick lunches, never store an open can of tuna in the fridge. Transfer it to a glass or plastic container. The metal will react, and your tuna will taste like a penny.
How to tell if your canned tuna is actually bad
Trust your nose before you trust the calendar. If the can hisses loudly when opened (like a fizzy soda), or if a foul, sour, or “rotten-fish” smell hits you—throw it out. Don’t be a hero.
Look for bulging, rust, or dents near the seams. Those are signs of bacterial gas or container failure. Your tuna should look unapologetically pinkish-white, not gray or brown.
Irony check: the most common “bad” tuna I’ve seen was actually perfectly safe but just tasted sad. So if it’s past the date but looks and smells fine, you’re probably fine—just add extra mayo or lemon.
How Is Canned Tuna Good For You at Glenn Barbee blog
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