[JD In Van]

I grew up on a farm. My father's worked in agriculture my entire life, first in growing and then in other aspects of managing, selling, transporting, and handling grain and produce crops.

What was posted above about bacteria is true, once unfrozen the bacteria begin to develop... though those same bacteria would have been far more developed by the time that food got to your door had it not been frozen.

The nutritional content is for the most part largely intact though. As long as you do not defrost your food in the microwave. And THAT is the trick. The mircowave does destroy the nutrients of multiple foods including, including water soluable vitamins like Vit C. Instead, ideally defrost foods in your fridge (which is cold enough to keep any bacteria growth slow) or if they're to be consummed immediately, put them in a ziploc bag and emerse them in hot water in the sink.

I wouldn't worry about the freezing. Humanity has used freezing to preserve and keep food safe forever. Worry about the radiation box on your kitchen counter that we're all so heavily dependant on.