There are not any main differences between Coke Zero and Diet Coke. You can drink both Coke if you want to reduce your sugar intake. These both contain some artificial sweeteners, which is not healthy.
Diet coke ingredients
These products are although the same. The main difference between these two products are first is sweetness and the second one is caffeine content. The key difference caffeine content is less in Coke Zero than in Diet Coke. Both products are well below recommended daily caffeine limit of 400 milligrams per day for adults and teenagers.
Main side effects
There are not many harmful side effects that come from drinking these drinks. Although, caffeine and artificial sweetness may cause a negative effect on some people.
The United States Department of Agriculture recommends that you can not take more than 400 milligrams in one day.
If you intake 4 cups of coffee or nine or eleven 12-ounce (350-ml) cans of Diet Coke or Zero Coke. Then you exceed the limit of drinking.
If you are highly sensitive to caffeine intake. You need to watch your intake of these beverages or you can contain a relatively low amount of caffeine.