Found this on the internet.

Those perfect grill marks on your hamburger patty that make it look so delicious aren’t real. Instead they were put there by the factory to make them look more appealing

To get a fresh order of French fries try ordering them without salt.

To check for cleanliness at a restaurant is to look up the ice chute on the drink dispenser. (Look for mold on metal rim)

Often the condiments and other ingredients are used from the night before

For shakes, real fruit not included. One milk shake can contain over 50 different chemicals in it.

Salads are usually not fresh. Instead they are made several days in advance and just sit around in the refrigerator until someone comes along and orders them.

One hamburger can contain the meat from up to 100 different cows. Not to mention whatever else it is they’re putting in these things.

Web site: http://couponconnections.com/18-things-fast-food-restaurants-dont-want-know/16/