It is not possible to make a perfect diet with only one other kind of food besides white bread.

It can be done with three: bread, milk, and spinach, for example.
If we substitute whole wheat for white bread, we can make a complete diet with two foods--this and milk.

We get from the bran and the germ what in the other case we got from the spinach.

_All the cereals can be effectively supplemented by milk and green vegetables._ If green vegetables (or substitutes for them like dried peas and beans or fruit) are hard to get we should give preference to cereals from which the bran coats have not been removed, such as oatmeal and whole wheat.

Then the diet will not be deficient in iron, which is not supplied in large enough amounts from white bread and milk.