What You Need to Know
Freeze drying, also known as lyophilization or cryodesiccation, is a low temperature dehydration process that involves freezing the product and lowering pressure, thereby removing the ice by sublimation. This is in contrast to dehydration by most conventional methods that evaporate water using heat.
Steps
- 1.
Astronaut ice cream (United States (NASA space program)): Preserves creamy texture without refrigeration
- 2.
Yak milk cheese (Chhurpi) (Himalayan region): Traditional preservation method for high-altitude storage
- 3.
Instant miso soup (Japan): Maintains umami compounds while allowing quick rehydration