Why Freeze Drying vs. other less expensive drying methods?

Freeze drying, or Lyophilization is the most common processing method for removing moisture from biopharmaceuticals, and it can increase the stability, temperature tolerance, and shelf life of these products. Although Freeze drying is well established within the industry, it requires expensive equipment that takes up a great deal of space within a production facility. Freeze drying also can take days to complete, and manufacturers that need a powdered product must incorporate a granulation step to the process. In an environment where budgets are tightening, and where time and facility space are at a premium, Freeze drying might be a difficult option for some companies.

FD/P3 FRUIT Washington Post Studio DATE: 2/20/06 PHOTO: Julia Ewan/TWP CAPTION: Freeze-dried fruit – L to R – Row 1 – Just Raspberries, Just Gone Bananas, Just Apricots – Row 2 – Just Peaches, Crunchies Mixed Fruit, Crunchies Cherries – Row 3 – Crunchies Mango, Crunchies Raspberries, Crunchies Pineapple.

Freeze drying removes the water, not the flavor. So freeze dried foods retain virtually all their fresh food taste, vitamins and nutritional content. Weighs less than fresh Freeze dried foods have 98% of their water removed. This significantly reduces the food’s weight, making it easier to handle and less costly to transport.

Once freeze dried, food products have the following benefits:
Appearance – Freeze dried foods maintain their original shape and texture, unlike air dried foods which shrink and shrivel due to high temperature processing. Just add water and in minutes the food rehydrates to its original form.
Taste – Tastes as good as fresh. Freeze drying removes the water, not the flavor. So freeze dried foods retain virtually all their fresh food taste, vitamins and nutritional content.


Weight – Weighs less than fresh. Freeze dried foods have 98% of their water removed. This significantly reduces the food’s weight, making it easier to handle and less costly to transport.
Long Shelf Life – Freeze dried foods can be stored for months or years at room temperature without deterioration or spoilage.
Low Storage Costs – Because it can be stored at room temperature, freeze dried food does not require costly cold or chilled storage facilities, making it much cheaper to store.

** Freeze Drying vs. Other Drying Methods:

Freeze DryingDrum DryingAir DryingSpray Drying
100%65%45%30%