Diet soda: Is it bad for you? - Mayo Clinic

Drinking a reasonable amount of diet soda a day, such as a can or two, isn't likely to hurt you. The artificial sweeteners and other chemicals used in diet soda are safe for most people, and there's no evidence that these ingredients cause cancer. Some types of diet soda are even fortified with vitamins and minerals.

But diet soda isn't a health drink or a cure for weight loss. Although switching from regular soda to diet soda will save you calories, some studies suggest that drinking soda of any type leads to obesity and other health problems. And healthier choices abound. ...