Nutritional comparison: Diet Coke vs. Coca-Cola Zero Diet Coke Nutrition (per 12 oz can): At first glance, both Diet Coke and Coca-Cola Zero Sugar seem identical in nutritional terms, with zeros ...

Although a 12-oz can of Coke only has 34 to 46 mg of caffeine (about one-quarter the amount in a cup of coffee), the effects may still work in your favor, Dr. Datta says. However, caffeine can be ...