In 1999 American man David Whipple purchased a McDonald’s hamburger, and 14 years later it looks exactly the same as it did the day he bought it. 

Whipple purchased the hamburger with the intention of keeping it for a month, so he could show friends and family how preservatives can prolong food in an alarmingly unnatural manner.

He forgot about the hamburger, only to come across it two years later in an old coat pocket, reports news.com.au

Whipple decided to continue with the experiment and claims the hamburger he purchased in 1999 remains the same – it is free from mould and fungus and it does not emit an unpleasant odour unlike most 14 year old foods.

The only thing that has changed is the pickle, which has decomposed.

He told US television The Doctors the experiment was not planned.

“I was showing some people how enzymes work and I thought a hamburger would be a good idea. And I used it for a month and then I forgot about it.

“It ended up in a paper sack with the receipt in my coat pocket tossed in the back of my truck and it sat there for, I don’t know, two or three months,” he said. 

Whipple still has both the original receipt and the hamburger, and he uses it to deter his grandchildren from eating fast food.