There may be debate about which is worse for your health - saturated fat or sugar (simple answer - they're both bad). However, few of us can be in much doubt about the dangers of sugary fizzy drinks for your health. Brought down to its simplest form, a can of sugared fizzy drink contains about 140 calories. If you estimate that an extra 3,500 calories = 1 lb weight gain, a single daily can would lead to 1 lb of weight gain every 25 days - that's a stone a year.
This is a companion discussion topic for the original article at https://patient.info/news-and-features/can-diet-drinks-cause-type-2-diabetes