Hello, I'm an expert in food science and safety. When it comes to canned refried beans, they can indeed go bad, but there are several factors to consider.

Firstly, canned refried beans have a long shelf life because they are cooked and then sealed in a can. This process helps to preserve them for an extended period. However, the shelf life can vary depending on the brand and the specific preservation methods used.

The expiration date on the can is a good indicator of when the manufacturer suggests the product is at its best quality. After this date, the quality may start to decline, but the beans may still be safe to eat for some time.

To check if canned refried beans have gone bad, you should look for signs of spoilage such as:
- Swelling or leaking of the can, which can indicate bacterial growth.
- A change in color, which might suggest the beans have oxidized.
- An off smell, which could be a sign of spoilage.

If the can is unopened and shows no signs of damage, it's generally safe to consume the beans. However, once opened, it's important to store the beans properly in the refrigerator and consume them within a few days to prevent spoilage.

In summary, while canned refried beans can go bad, they are designed to last for a long time if stored correctly. Always check for signs of spoilage before consuming.

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Properly stored, an unopened can of refried beans will generally stay at best quality for about 3 to 5 years, although it will usually remain safe to use after that. ... Discard all canned refried beans from cans or packages that are leaking, rusting, bulging or severely dented.read more >>