The freeze-drying process often results in minimal changes to the color and appearance of the food. This is in contrast to other preservation methods, such as canning or dehydration, which can lead to more pronounced alterations in food aesthetics.
Freeze drying significantly extends the shelf life of food by removing moisture, which is a key factor in the growth of microorganisms, such as bacteria and molds. Without water, the food is less susceptible to spoilage.
Unlike some traditional drying methods that can lead to nutrient loss, freeze drying helps retain the nutritional content of the food. The low temperatures used in the process minimize damage to heat-sensitive vitamins and enzymes.