I don't know.
I and a woman who cooks all the time tried it out...it's the best tasting powdered milk I've ever tried. I had her test it after my experience and she said the same, good. So, I bought 12 cans and put it in storage for when TSHTF.
Previously, (before I discovered this stuff) I had been buying Carnation Instant non-fat Dry Milk for possible cooking use by other people because I sure didn't like it. Anyway, It may just be a matter of taste.
You know what? I have probably 15 pounds of non-fat dry milk in storage with O2 absorbers, mostly if I need it for cooking, as I rarely drink whole milk.
But one thing I found if you want to drink it:
Go to the store and buy a jar of like the Carnation instant coffee creamer. Mix up your powdered milk and add about a tablespoon of the coffee creamer and shake well.
Makes it much, much more palatable and a lot closer to the taste/texture of whole milk. And you can store the non-dairy creamer powder for like forever!