Ten years ago, in 2004, documentary maker Morgan Spurlock decided to see what would happen to his body if he ate nothing but McDonald's food for 30 consecutive meals.

The 32-year old consumed over 5,000 calories a day and by the end of his experiment had gained 24 pounds. His body mass index had increased by 13 per cent and he reported mood swings and sexual dysfunction. It took him a further 14 months to return to normal.

So why would anyone wish to repeat such an unhealthy experiment, when it's clear at the outset that the results are going to make for depressing reading?

Ours is not to reason why - ours is to share this video of 50-year-old George Prior, from Los Angeles, who drank 10 355ml cans of Coca-Cola a day for a month to see how it would affect him.

Perhaps unsurprisingly, the previously gym-toned Mr Prior put on two stone in weight, and saw his blood pressure rise to an unhealthy 145/96. He also reported strong cravings for more sugar, even though he was consuming 350g of sugar daily from his Coke intake alone.

Mr Prior, who has been chronicling his Coke consumption in a series of daily online videos, said: "I did the experiment to get people thinking and talking about how much sugar they eat and how unhealthy it is. People need to be aware of the real and powerful damaging effects of sugar on their health.