Tuna salad is a comfort food favorite, cherished for its creamy texture and simple preparation. Whether it’s served on a sandwich, with crackers, or eaten straight from the bowl, this dish often stirs up nostalgic memories of relaxed lunches or family picnics. Its main ingredients—canned tuna, mayonnaise, and crunchy vegetables like celery or onion—make it a satisfying and easy-to-make meal. But despite its cozy appeal, tuna salad must be handled with care, as it can become a serious food safety hazard if improperly stored.

Once a can of tuna is opened or the salad is prepared, the risk of bacterial growth begins. Tuna salad is classified as a perishable food, which means it must be kept cold to prevent harmful microorganisms from multiplying. If left out at room temperature for more than two hours, it enters the “danger zone” (40°F to 140°F or 4°C to 60°C), where bacteria thrive. On warmer days, this window shortens significantly, making quick refrigeration essential.

Proper storage can help prevent foodborne illness. Store tuna salad in airtight containers made of glass or BPA-free plastic to avoid contamination. Place it in the main section of your refrigerator—where the temperature is stable—and not on the door, which is more prone to fluctuations. Importantly, tuna salad should be consumed within 3 to 5 days of preparation. Even if it still smells or looks fine after that, it may not be safe to eat due to invisible bacteria.

There are a few signs to look out for if you’re unsure about the freshness of your tuna salad. A sour or “off” odor, slimy texture, or discoloration such as brown or gray streaks are clear signs it’s time to toss it. Trust your senses, and remember the food safety motto: “When in doubt, throw it out.”

Spoiled tuna salad can lead to food poisoning, especially dangerous for older adults or people with weakened immune systems. Symptoms like vomiting, cramps, and dehydration can lead to hospital stays or worse. Experts stress the importance of not taking chances with perishable foods, especially seafood-based ones.

In summary, tuna salad can remain a delicious part of your meals if handled responsibly. Keep it cold, store it correctly, and enjoy it fresh within a few days. When done right, tuna salad should comfort and nourish—not cause harm.