Could a human live on water and supplement tablets?

Bring me pizza, a human living on a diet of water and vitamins would be very dissatisfied!


Asked by: Eamonn Wylie, Cookstown

No. As well as vitamins and minerals we also need carbohydrates, fats and proteins for energy and to repair our bodies.

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.