I read this article and was shocked.

Mcdonald hamburgers never go bad! Almost all  processed foods contain artificial additives.

I can't avoid to eat these foods, but I  am trying to cut back on them and other junk food.

http://www.dailymail.co.uk/news/article-2313276/Man-keeps-McDonalds-burger-14-years-looks-exactly-the-day-flipped-Utah.html