Why can’t food be refrozen once it has been unfrozen?
In: Chemistry
It can, but there are two reasons not to.
First is contamination. Freezing slows the growth of bacteria and mold. When you unfreeze, that growth starts again. When you then freeze it again, all that contamination is still there.
Second is by freezing and unfreezing and freezing again, you are destroying the cells of the food, and dehydrating it, so it will taste worse and worse the more times you do it.
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