14. Budweiser

Budweiser—also known as the “King of Beers”—is one of the most popular mass-produced beers in North America, and it is a sponsor of major athletic events and leagues like the NFL. As such, most beer drinkers have probably had one of these at one time or another. Budweiser, though, is made with genetically modified corn (GMO). Since its rise in the 1980s, as the biotechnology behemoth, Monsanto, began to genetically modify corn to withstand herbicides without a drop off in crop supply, GMO corn has been linked to a host of health problems. It encourages the overdevelopment of a white blood cell called eosinophil, which, when overproduced, attacks our bodies’ organs, nervous and cardiovascular systems, and skin. As such, people should avoid consuming too much GMO corn.

13. Corona Extra

This one will hurt for a lot of people, as Corona has become the popular choice for a light cerveza in the summer months. The ubiquitous commercials for this beer also have a quality of not being annoying or cloying, a rarity in today’s television-advertisement landscape. Unfortunately, Corona Extra is made with GMO corn syrup and Propylene Glycol, the former of which being derived from GMO corn. Propylene Glycol, though, is an ingredient that has stirred controversy amongst health professionals, and it is a common ingredient found in anti-freeze. Again, abstaining from Corona is the consumer’s choice, but the revelation of Corona’s potentially harmful ingredients probably makes those commercials look more insidious than relaxing.