These are the ingredients in a McDonald's hamburger bun:
Enriched flour (bleached wheat flour, malted barley flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic acid), water, high fructose corn syrup, yeast, partially hydrogenated soybean oil, soybean oil, canola oil, contains 2% or less of each of the following: salt, wheat gluten, calcium sulfate, soy flour, ammonium sulfate, calcium carbonate, calcium phosphate, monocalcium phosphate, ammonium chloride, baking soda, sorbic acid, deactivated dry yeast, dough conditioners (may contain one or more the following: distilled monoglycerides, DATEM, sodium stearoyl lactylate, calcium peroxide, ascorbic acid, azodicarbonamide, mono- and diglycerides, enzymes, guar gum), calcium propionate & sodium propionate (preservatives), soy lecithin.

These are the ingredients in the bread I buy (Ace Bakery Organic Granary):
Stone-ground whole wheat flour, water, sour starter (stone-ground whole wheat flour, water), honey, kamut, amaranth, soft wheat kernel, flax seeds, millet, sunflower seeds, salt, yeast.