What is the best way to tell whether food from a bulging can safe eat?

There is no safe way to tell if food from a bulging can is safe to eat. Bulging cans are a sign of spoilage, and the food inside may be contaminated with bacteria that can cause food poisoning. Even if the can does not appear to be bulging, it is still possible for the food inside to be spoiled. Therefore, it is always best to err on the side of caution and discard any cans that are bulging or appear to be damaged.