Bologna may seem like one of the most mysterious foods in the deli aisle, especially with its smooth texture, bright pink color, and reputation as “junk food.” It often appears in lunchboxes and on simple sandwiches, yet many people rarely stop to think about what is actually inside those familiar slices.

Despite the myths surrounding it, bologna is not simply a random mixture of leftover meat. Modern bologna is a processed sausage typically made from beef, pork, chicken, or a combination of meats. The ingredients are finely ground and emulsified into a smooth mixture, then cooked and sometimes smoked inside natural or synthetic casings. Although stories about beaks, hooves, and other unusual scraps are common, commercial bologna is generally made according to food regulations and uses specified meat and fat ingredients.

The history of bologna becomes clearer when you look at its Italian relative, mortadella. Mortadella originated in Bologna, Italy, and is traditionally known for its large pieces of pork fat, along with ingredients such as peppercorns and pistachios. American-style bologna developed into a much smoother and more uniform product designed to be affordable and easy to slice.

So while bologna is certainly a processed food and may not be considered a particularly nutritious choice, it is not quite the mysterious food that popular rumors make it sound like. Its familiar pink slices are the result of finely processed meat, fat, seasonings, and cooking methods that have evolved from a much older sausage-making tradition.