Whole wheat brown bread has a “nutritional advantage” over white bread, according to the American Academy of Pediatrics. This is because brown breads made from whole wheat usually contain more fiber than white bread, as well as greater amounts of important nutrients such as vitamins B-6 and E, magnesium, folic acid, copper, zinc and manganese.
Depending on the brand, however, this may not be the case, because many white breads come fortified with vitamins and fiber. White bread usually contains more calcium than brown bread. However, many manufacturers now fortify brown bread with calcium.