I am a freezer queen- I hear what the CDC said, but I have been freezing shakes since week one and have been losing wieght steadily and have suffered no side effects- thought my hair was thinning, but false alarm, and my skin is like a peach (simper)- food science tells us that freezing does preserve nutrients (I checked this with University colleagues in the dept of food and human nutrition)- otherwise birds eye peas would not be as fresh as the day they were picked and 99% of fish in the supermarket would be rotten- so I say freeze away- lovely chocolate bars and loverly ice cream- anything to make the diet go easier.