Description
Lyophilization removes water from food by sublimation under vacuum, preserving structure and flavor without heat.
Technical
During primary drying, ice sublimates directly to vapor under low pressure, bypassing the liquid phase and preventing denaturation of proteins. Secondary drying removes bound water by raising temperature while maintaining vacuum, ensuring low residual moisture. The process preserves tertiary protein structure and minimizes oxidation by avoiding high temperatures.
Science
Primary Reaction
Sublimation of ice to water vapor under vacuum
Sensory Profile
Aroma ()
drycrispsubtlepreservedneutral
Origin & History
Civilization
pharmaceutical industry
Era
1940s