Advantages of freeze-dried products:
Freeze-dried products have several advantages over conventional hot-air dried products.
1) Freeze-dried products can be stored for a long time. Freeze-dried substances can be stored at room temperature without refrigeration if they are sealed to prevent reabsorption of moisture, and they can be protected from spoilage for years. Preservation is possible because the greatly reduced water content inhibits the action of microorganisms and enzymes that normally destroy or degrade substances.
2) Easy to transport. Lightweight and well-packaged lyophilized products can be easily transported in normal containers or any other shipping method. No refrigeration facilities are required, saving a lot of shipping costs.
3) Better quality products. Freeze drying is less damaging to the material than other dehydration methods that use higher temperatures. Freeze drying generally does not cause shrinkage or hardening of the material being dried. In addition, appearance, flavor, smell, and nutritional content generally remain the same, making the process popular for preserving high-quality food.
4) Very high rehydration ability. Freeze-dried products can be rehydrated (reconstituted) faster and easier because the process leaves tiny pores. Pores are created by sublimated ice crystals, leaving voids or pores in their place. This is especially important when it comes to instant or convenience food use.
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