It's not an exact science

Since many of these sauces lack nutritional information or expiration dates, it's challenging to determine how long fast food condiments will remain good. (If you're curious about where to find that information, it’s typically on the box that originally contained those packets.) If a packet is damaged, shows signs of mold, or has any unusual tastes or textures, it should always be discarded.
For optimal peace of mind, store those packets in the refrigerator. Some condiments, like salt, pepper, sugar, and honey, can last nearly forever without issue. However, for others that contain ingredients that can spoil, such as mayonnaise, butter, or dairy products, or if the packaging is paper rather than plastic, proper storage can help you truly enjoy all those packets you've diligently collected. (This also applies to your soy sauce packets.) First and foremost, consider: Are these sauces worth the valuable space in your kitchen?
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