Is there wood in your burger?

[NEW YORK] On June 30, Quartz's Devin Cohen alerted the world that "There is a secret ingredient in your burger: wood pulp." Having perused the ingredients lists of McDonald's, Burger King's and other fast food chains' menu items, Mr Cohen noticed that many of them contained cellulose, a dietary fiber that is sometimes derived from wood.

Mr Cohen called cellulose's spread on fast-food menus "stealthy" and described the fibre as "difficult to avoid."

Why you should want to avoid cellulose, on the other hand, Mr Cohen didn't say, other than to note that cellulose has "no nutritional value" and that "some studies suggest that microcrystalline cel…