A dietician showed me a 1 year old hamburger from McDonalds. The burger was just hard, it didn't smell, there was no mold on the bun! At first I found this hard to believe but than she pointed out old french fries. Alot of times specially if you have kids you'll find french fries under the seats
Maybe a year or more later. They are the same way! Fast Food is so full of Perservatives. The problem with that is when we eat food like that it doesn't digest properly.