The main difference is obviously that cola contains sugar and diet cola contains artificial sweetener - but what are the health implications of each?
Asked by: Bertie Green, London
The main difference is obviously that cola contains sugar and diet cola contains artificial sweetener. In the UK, that sweetener is aspartame and the current scientific consensus is that this additive is safe at the concentrations found in diet drinks. The 35g of sugar – around seven teaspoons – in a can of Coca-Cola, on the other hand, contains 139 calories, which will contribute to obesity and tooth decay. It can also lead to Type II diabetes if you drink too much of it. On balance, diet cola is probably the least bad but neither is actually good for you.
Subscribe to BBC Focus magazine for fascinating new Q&As every month and follow @sciencefocusQA on Twitter for your daily dose of fun science facts.
Luis trained as a zoologist, but now works as a science and technology educator. In his spare time he builds 3D-printed robots, in the hope that he will be spared when the revolution inevitably comes.
Subscribe to BBC Science Focus Magazine and try 3 issues for just $9.95
Discover our latest special editions covering a range of fascinating topics from the latest scientific discoveries to the big ideas explained.
Listen to some of the brightest names in science and technology talk about the ideas and breakthroughs shaping our world.
By entering your details, you are agreeing to our terms and conditions and privacy policy. You can unsubscribe at any time.