PepsiCo is changing the recipe of Pepsi Zero Sugar to more closely mirror the taste of its signature cola with sugar, the snack and beverage giant said in a statement. Compared to the previous version of its Pepsi Zero Sugar, the soda maker said it made the caffeine level the same as regular Pepsi and removed the ginseng, which is not in the sugar version of the beverage. The change to Pepsi Zero Sugar comes as shoppers look for ways to curtail their sugar intake.