An all time favorite that you use for making your favorite sandwiches, to spread peanut-butter and jelly, to accompany all of your meals and so on.
And why it is on trial today? Because beside being the most common food, it is also an ultra-processed food. No matter if you make it at home from whole ingredients or if you buy the “industrial” Wonder Bread at the supermarket, it's still ultra-processed food.
Not all bread is created equal
In it’s most raw form bread is made up of unprocessed ingredients (yeast and water) and of lightly processed ingredients (flour).
Industrial breads on the other hand have a whole range of more ingredients in it; such as white sugar, potato flakes, powdered milk, butter, margarine, etc.
Even if there is a enormous contrast in quality between freshly baked rough breads and mass produced “plastic” products according to the above mentioned classification both are considered to be an ultra-processed food.
Having said that comparing "Wonder Bread" to home made organic bread is like comparing apples and oranges. It might be still the same kind of food, but nutritionally they're two completely different worlds.
Should bread be a staple food?
Bread is recommended in practically all official guidelines as healthy and good to consume abundantly. Is this a mistake? It's arguable at the least and a differentiation should be made before drawing any conclusion.
On one side, mass-produced breads are grossly degraded and palatable, and most of the time a mere vehicle for what are usually fatty or sugary and often also salty spreads, fillings or toppings. In addition, they're usually made with flour from just a few strains of wheat, the rest are industrial made ultra-processed ingredients.
On the other side, whole wheat homemade organic breads or (even better) sourdough breads are baked with wholesome ingredients that retain most of their nutritional value. Including vitamins, iron and precious proteins.
If you want to make bread part of your diet you should definitely choose the latter kind. Make you own or buy at some local bakeries that you know are doing their job properly.
Just keep in mind that it's an energy dense food so you'll need to balance out the calories otherwise. Also, if you follow the paleo diet, you'll probably disagree with eating bread all along. Am I right?