Another major difference between Diet Coke and Coke Zero, Sharp points out, is caffeine content. A 12-ounce can of Diet Coke has about 46 milligrams, while Coke Zero has 34 milligrams.

Caffeine. Add Topic. Americans drink a staggering amount of Diet Coke, other sodas. What does it do to our stomachs? Daryl Austin. USA TODAY. Americans love their soda.

The fact is, caffeine-free Diet Coke is the coward’s way. If you are a ride-or-die Diet Cokehead, you understand that the only acceptable version of Diet Coke is the classic variety, perfect ...

Diet Coke is a vice Theresa Amrhein can’t seem to quit. The 33-year-old Upper East Sider tries to follow a healthy lifestyle. She walks up to 10 miles a day, goes meat-free at lunch and does ...

Diet Coke has more caffeine than regular Coke. This can seem strange, but there's an important reason for the added boost that you might not have noticed.