National Library of Medicine

Freeze-drying, also known as lyophilization, is a process in which water in the form of ice under low pressure is removed from a material by sublimation. This process has found many applications for the production of high quality food and pharmaceuticals...

......In the process, the quality of the dried product (biological, nutritional, and organoleptic properties) is retained........

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Healthline

Freeze-dried foods are often used for hiking, camping, space exploration, emergency and survival applications, and military rations. They are preferred over regular foods due to their light weight, long shelf life, portability, and ease of preparation....

....Freeze-drying is a way of dehydrating frozen food via a process that transforms ice into vapor, also known as sublimation.....

....It is a healthy food preservation method, as it retains most of the beneficial plant compounds and nutrients in foods, as well as their color, taste, and appearance.

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