, pits Coca Cola and Coke Zero against each other.
Pouring a 375ml bottle of each in to a frying pan, they are placed over the heat.
Once they reach boiling point, the water slowly begins to evaporate.
And as it does a disturbing reality is hard to ignore.
The frying pan full once full of regular Coke is left covered in a thick, black slime - a mass of sugar.
In contrast, the remnants of the Coke Zero show a small trace of burnt sugar covering barely a quarter of the frying pan.
A can of Coca Cola contains 35g of sugar - exceeding the 30g recommended daily allowance for adults.
And it far exceeds the 19g NHS chiefs recommend as a maximum for kids aged four to six.
Eating too much sugar drastically increases a person's risk of obesity, heart disease and type 2 diabetes - all killer diseases.
Sugar is found naturally in foods, but the sugar in fizzy drinks is known as added sugars.
The NHS recommends that added sugars don't make up more than five per cent of an adults total calorie intake for the day.
That's where the 30g figure comes from, and applies to everyone over the age of 11.
In a bid to tackle obesity, the Government today confirmed a new sugar tax will come into effect next April.
Health experts welcomed the “bold” move, with the Royal College of Paediatrics and Child Health, adding it “is a real victory for child health”.
Dr Mark Porter, chair of the BMA, said: “This is a welcome and crucial move.
But he said, alone a sugar tax is not enough.
He called for restrictions on junk food marketing that targets kids and action on price promotions.
The sugar tax will apply to drinks with more than five grams of sugar per 100ml will be levied by 18p per litre, while those with eight grams or more of sugar per 100ml will have an extra tax of 24p per litre.
Drinks with 5 grams of sugar will be exempt.
Previous estimates said that the new tax could whack up the cost of a 2 litre bottle of Coca-Cola (10.6g per 100ml) by as much as 48p if the plans go ahead as announced and the drinks giant doesn’t alter its recipe.
A standard can of regular Coke, currently costing around 70p, will be slapped with a 8p increase while the same amount of Sprite (6.6g per 100ml) would go up by 6p.
But while sugar-free alternatives may seem like the healthier option, a growing body of scientific research has shown diet drinks don't help fight the flab.
One study, published earlier this year, found diet drinks do not cut the risk of developing obesity-related conditions like type 2 diabetes.
Experts warn they could cause weight gain, by stimulating a person's sweet tooth and encouraging them to gorge on more.
Another theory is that sweeteners alter the bugs in your gut, making it harder for the body to use sugar effectively.
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