Freeze-dried food is a special kind of food dehydration. Frozen, much of the air is pumped out of the tank at low temperature. The "food water" evaporates from solid to gas (sublimation). It's supposed to maintain the structure of the food better. But, you're going to rehydrate it, cook it, chew the hello out of it then your digestive system will take everything apart. The little building block biomolecules are all you can absorb anyway.
In any case, you need to pay attention to eating all the needed biomolecules. You must have fats. Protein is fine if you get all 20 common amino acids found in protein. Corn/maize used to be really poor in Lysine, and essential amino acid that you can't make. Stuff like that to be mindful of. Carbs as starches are easily found in bulk provided that you lace it with proteins and fats.
