If you are an avid internet user, you may have heard of certain fast food horror stories about some stomach-churning ingredients hidden in your burgers or tacos. Even Taco Bell is not safe from having some rather bizarre secret ingredients — in the form of wood pulp.

A 2014 Quartz report found that multiple companies, including Taco Bell, were using "microcrystalline cellulose" in their products. Author Devin Cohen describes cellulose as "wood pulp." and Taco Bell was identified to have an alarming nine menu items with cellulose as an additive.

Refinery29 describes cellulose as being composed of "oxygen, hydrogen, and carbon," which makes it "the most abundant organic compound on earth." Cellulose is actually widely common in a variety of foods, such as bread and dairy products. Wood pulp is a common source of cellulose, but rest assured that you're not eating wood when consuming Taco Bell's seasoned beef.