Is Aspartame Bad for Your Health? What to Know About Diet Coke’s Key Ingredient

Two different arms of the World Health Organization are expected soon to release separate reports on aspartame, the sweetener used in Diet Coke, Pepsi Zero Sugar and other diet sodas. 

Beverage industry experts say they expect one of the groups to reaffirm its decadeslong assessment that aspartame is safe. They expect the other group, called the International Agency for Research on Cancer, to identify aspartame as a possible cancer hazard.

Here’s what you need to know: