Why does freeze-drying effectively prevent the growth of bacteria and mold?
Answer
Microorganisms require moisture to survive and thrive.
Bacteria, yeast, and mold require moisture to carry out their biological functions and reproduce. By removing virtually all moisture from food products, the environment becomes inhospitable for these microorganisms. Without available water, they cannot grow or survive, which effectively sterilizes the food against microbial spoilage. This shelf-stability is critical for long-duration space missions where food must remain edible for months or even years.
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