Quick Answer
FREEZE DRIED MEALS ARE OFTEN FROZEN FIRST, THEN DRIED, BUT THE PROCESS VARIES DEPENDING ON THE MANUFACTURER. FREEZE DRIED MEALS USUALLY RETAIN MORE NUTRIENTS AND HAVE A LIGHTER WEIGHT THAN FROZEN MEALS. FROZEN MEALS, ON THE OTHER HAND, ARE OFTEN COOKED AND THEN FROZEN.
Freeze Drying Process
The freeze drying process typically begins by freezing the ingredients. This is followed by a vacuum that removes the water content, preserving the nutrients and texture of the food. Freeze dried meals can retain up to 98% of their original nutrients. To achieve this, manufacturers use a combination of low temperatures and high vacuum pressure to remove moisture. The entire process can take several hours, depending on the equipment and the type of food being preserved. Freeze dried meals are often packaged in airtight containers or pouches to maintain their freshness.
Comparing Freeze Dried and Frozen Meals
Freeze dried meals generally have a longer shelf life than frozen meals, with a storage life of up to 25 years. Frozen meals, on the other hand, typically have a shelf life of 6-12 months. Freeze dried meals also tend to be lighter in weight, making them easier to transport. For example, a freeze dried meal might weigh 4 ounces, while a frozen meal might weigh 8 ounces. The preparation method for freeze dried meals is also simpler, requiring only the addition of hot water to rehydrate the food.
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