Food going "bad" describes a decline to what level regarding the food's characteristics?

Answer

An unacceptable level of quality, taste, appearance, or safety

When food goes "bad," it describes a state where the food's quality, taste, appearance, or safety has declined to an unacceptable level.

Food going "bad" describes a decline to what level regarding the food's characteristics?
foodpreservationdegradationspoilagetype