Researchers from the Laurel School in Shaker Heights, Ohio, found that, among eight popular fast food hamburgers analyzed, some were found to contain as little as two percent actual meat, which may come as a surprise to some.

A true American meal pastime, hamburgers are consumed at a rate of about five billion patties annually in the U.S. Most people who eat hamburgers likely assume that those succulent patties grilled over an open flame are pure meat from cows. But according to the histological data, hamburger patties are generally composed mostly of water, as well as varying percentages of random tissues, nerves, and a small percentage of actual meat.