I noticed that as well. The question is, if the buns are not able to mold, how did they achieve that?
"The real question in my mind is why don't the buns mold? That's the really scary part, since healthy bread begins to mold within days. What could possibly be in McDonald's hamburger buns that would ward off microscopic life for more than two decades?
As it turns out, unless you're a chemist you probably can't even read the ingredients list out loud. Here's what McDonald's own website says you'll find in their buns:
Enriched flour (bleached wheat flour, malted barley flour, niacin, reduced iron, thiamin mononitrate, riboflavin, folic acid, enzymes), water, high fructose corn syrup, sugar, yeast, soybean oil and/or partially hydrogenated soybean oil, contains 2% or less of the following: salt, calcium sulfate, calcium carbonate, wheat gluten, ammonium sulfate, ammonium chloride, dough conditioners (sodium stearoyl lactylate, datem, ascorbic acid, azodicarbonamide, mono- and diglycerides, ethoxylated monoglycerides, monocalcium phosphate, enzymes, guar gum, calcium peroxide, soy flour), calcium propionate and sodium propionate (preservatives), soy lecithin.
Great stuff, huh? You gotta especially love the HFCS (diabetes, anyone?), partially-hydrogenated soybean oil (anybody want heart disease?) and the long list of chemicals such as ammonium sulfate and sodium proprionate. Yum. I'm drooling just thinking about it.
Now here's the truly shocking part about all this: In my estimation, the reason nothing will eat a McDonald's hamburger bun (except a human) is because it's not food!"
Learn more:
http://www.naturalnews.com/030074_Happy_Meal_decompose.html#ixzz1hqtMre9f