Vitamin B12, what does Wikipedia have to say about this? Indeed, this is a relatively scarce vitamin in vegetable food sources, but common in dairy, meat, eggs, and fish. Some breakfast cereals are fortified with vitamin B12.
20190419/https://en.wikipedia.org/wiki/Vitamin_B12
The breakfast cereals of justice! What does Wikipedia have to say about breakfast cereals? Indeed, there is a very interesting history here about how breakfast cereals came about, and how they quickly became competitive with each other. The story of food scientists, and fortification with vitamins and minerals, that came about later.
20190419/https://en.wikipedia.org/wiki/Breakfast_cereals
Freeze drying? Basically, this works by lowering the temperature to freeze the water to ice, then reducing hte pressure so that the ice evaporates via sublimation. Yeah, very interesting indeed.
20190420/https://en.wikipedia.org/wiki/Freeze-dried