Corn syrup doesn't spoil in the same way as dairy products because it lacks proteins and fats that degrade quickly. However, it can go bad due to contamination or improper storage.
An unopened container of corn syrup can last indefinitely. For best quality, it's recommended to use it within two years if unopened and six months if opened. Light corn syrup may turn slightly yellow with age, but this is normal and not harmful.
Although manufacturers are required to put an expiration date on corn syrup, it doesn't truly expire. The high sugar content makes it a challenging environment for bacteria to grow. However, if left unsealed, it can absorb moisture from the air, which can impact its texture and taste.
To ensure the best quality, store corn syrup in a cool, dark, and dry place. It's best to keep it tightly sealed to prevent moisture absorption.
