I'm not sure but if you can it would destroy so many of the beneficial enzymes, vitamins, and organic compounds.

Why would you want to???? Food enzymes, which are extremely beneficial to health, are killed when the food is heated above 118 degrees F. The food is essentially dead at that point. Live food helps the body repair cells and promotes general good health. Everyone should eat live food, or more easily understood, raw food EVERY DAY. If you do, the food enzymes in your body do not have to be used to break your food down, and they are then used in cell repair. So when you are lying in bed each night, ask yourself: "Did I have any raw food today?" If the answer is "no", you'd better get some the next day. For example, I juice fruit every morning and drink it with all my supplements. So, today I juiced two pears and that is a start on my raw food for the day.. A salad should be in my future, too! Do not forget the benefits of sprouting seeds. These little raw plants are the MOST nutritious foods of all. Sprouted lentils can sustain life. Think about that when prepping. Bread and sprouted lentils can keep you alive. This is what the Desert Fathers lived on in the early centuries of Christianity. We can go back and follow their example. Buy wheat, get a grain mill, make your own bread and sprout lentils. You will survive.

Well you can cook down regular milk and then dry it in an oven to concentrate, so I assume equipment to freeze dry food is possible to use to freeze-dry breast milk. Once it is dried you can put it in a small food processor or a dedicated spice grinder and grind into a powder. However, if you cook it down, it does destroy the nutrients to some degree due to the heat. I am not a scientist, so I can’t provide any concrete measures on that. I am not able to address the nutritional value over prolonged time periods. I assume that just like freeze dried regular food, there would be a limited shelf life. That is a good thought, but I am not sure how you would reconstitute it either.