How Long Is Tuna Salad Safe In The Fridge?

Tuna salad is generally safe in the fridge for 3-5 days when stored properly in an airtight container at or below 40°F (4°C). The USDA and FDA recommend consuming refrigerated prepared foods like tuna salad within this timeframe to minimize the risk of foodborne illness. Key factors affecting safety include:

• Ingredients: Mayonnaise-based tuna salad spoils faster than oil-based versions due to the perishable nature of eggs in mayo. Fresh additions like celery or onions can also introduce moisture, accelerating spoilage.
• Storage: Ensure it’s refrigerated promptly after preparation and kept in a sealed container to prevent contamination.
• Signs of Spoilage: Discard if you notice an off smell (sour or rancid), unusual texture (slimy or watery), or visible mold. Always trust your senses over the calendar.

Your instinct to avoid it after day three is cautious but reasonable, as quality and safety can decline rapidly after that point, especially if not stored optimally. If your sister keeps it for a week, it’s likely past the safe window unless frozen, which can extend shelf life to about a month.