Diet Pepsi gets rid of aspartame in effort to woo back customers

NEW YORK -- A revamped Diet Pepsi without aspartame is popping up on store shelves. So will people start flocking back to the soda?

PepsiCo says its new Diet Pepsi should be available nationally this week. In response to customer feedback, the company said earlier this year it would replace the aspartame in the drink with another artificial sweetener that has less baggage.

The rollout will test the theory the sweetener is to blame for fleeing customers or whether other issues might be at play. Other diet sodas that still have aspartame include Diet Coke, Diet Dr Pepper and Fanta Zero.

Sales of traditional diet sodas have been falling. Industry executives blame the decline on unfounded concerns people have about aspartame. Two years ago, Coca-Cola even tested ads in select newspapers defending the safety of the sweetener.

"It's the No. 1 thing that our customers have been calling about," said Seth Kaufman, a senior vice president at PepsiCo.

In terms of taste, Kaufman said it's not identical, but the drink still should be familiar to fans of Diet Pepsi.

In 2012, the company tried improving the drink by combining aspartame with acesulfame potassium, often called ace-K, another artificial sweetener that helps prevent the taste from degrading. The latest version of Diet Pepsi will have ace-K in addition to sucralose, best known by the name Splenda.

Cans and bottles of the new Diet Pepsi have been making their way through the distribution in recent weeks. Stores that don't do a lot of business still may have the old versions stocked. This weekend, for instance, a store in New York City had the old and new versions side by side.

The new cans will be marked with the words "Now Aspartame Free" above the Pepsi circle logo.