When any food comes in contact with oxygen the food get oxidised.
This process is called rancidity. When this process is complete the food emits a foul smell and doesn't taste the same . There might also be some microbes enter to the food for the their diet this is why it's not recommendable to eat that food.
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Answer:
When any food comes in contact with oxygen the food get oxidised.
This process is called rancidity. When this process is complete the food emits a foul smell and doesn't taste the same . There might also be some microbes enter to the food for the their diet this is why it's not recommendable to eat that food.