The vast majority of breads are adulterated to a point of being virtually fraudulent. At least in the US there is pretty much only two brands of bread that are actually good, and most people have access to only one, if any. Here's a video that goes into detail about it:
Just make it. I don't buy bread and haven't in years. It's not saving me any money but flour, salt, and water are the only ingredients in most of my breads and they are as good as the fanciest bakery rustic sourdough. And easy as heck to make, sourdough is so forgiving.
The darkest bread there is, is usually bread that is articifially dark. Here in the Netherlands we have bread colored as chocolate, that
would actually be white but is made to look dark so people think it's healthier.