The shelf life of a sub with mayonnaise in the fridge can vary depending on a few factors, such as the ingredients used, storage conditions, and the freshness of the ingredients at the time of purchase. However, as a general guideline, a toasted sub with mayonnaise should be consumed within 2 to 3 days if stored properly in the refrigerator.
Mayonnaise is a perishable ingredient, and once it's been applied to the sub, it can potentially harbor bacteria if not stored correctly or left at room temperature for too long. To maximize the shelf life of your sub, follow these tips:
Refrigerate promptly: As soon as you purchase the toasted sub, make sure to refrigerate it promptly to slow down bacterial growth.
Store properly: Place the sub in an airtight container or wrap it tightly in plastic wrap or aluminum foil to prevent it from drying out and to avoid cross-contamination with other foods in the refrigerator.
Check the ingredients: The freshness of other ingredients in the sub can also affect its overall shelf life. If the sub contains perishable items like deli meats, cheese, or vegetables, their freshness will also play a role in how long the sub remains safe to eat.
Monitor the smell and appearance: If the sub develops an off smell, strange texture, or any signs of mold or spoilage, it's best to discard it immediately, even if it's within the 2 to 3 day timeframe.
Remember, these are general guidelines, and if you're ever unsure about the safety of the sub, it's better to err on the side of caution and discard it to avoid any potential foodborne illnesses.