[Edward64]

I don't know how reliable econotimes.com is but one question answered

Coca-Cola clarifies Coke Zero, Diet Coke do not contain sugar substitute linked to health woes - EconoTimes

Coca-Cola clarified that Coke Zero and Diet Coke do not contain the sugar replacement called erythritol but instead have aspartame.

According to Coca-Cola’s official website, aspartame is used in some of its products including Coke Zero Sugar, Diet Coke, Diet Coke Feisty Cherry, Diet Barq’s, Fanta Zero, Fresca, Gold Peak Diet Tea, Mello Yello Zero, Minute Maid Light, Pibb Zero, Seagrams Ginger Ale Zero Sugar, and Sprite Zero.

Aspartame provides low or no sugar calories option.

Unlike erythritol, aspartame hasn’t been linked with any serious side effects or health problems.

I have been using stevia instead of sugar for my coffee (3-5 cups a day).