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<pre><pre>Swallowing two large energy drinks within an hour is dangerous for the heart

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British thirst for caffeinated beverages has risen sharply: at least 600 million liters are drunk every year, 200 million more than ten years ago.

Figures from the British Soft Drinks Association show that the volume of energy drinks consumed in the UK has increased from 463 million liters in 2010 to 679 million liters in 2017, with the UK market now for £ 2 billion a year.

Approximately 55 percent of people aged 12 to 24 suffer from vomiting and chest pain to even seizure of the drink, even though most consume less than the recommended one-to-two drinks per day, a Canadian study found last January.

In addition to the alarmingly high caffeine content of the drinks, the researchers believe that they consume alcohol or make them even more dangerous during exercise.

Previous research has linked energy drinks, such as Red Bull, to overweight, heart disease and even a sudden death due to their high sugar and caffeine content.

Most energy drink consumers are unaware of the key ingredients of the products, health implications or suitable serving sizes, experts have said.

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How much caffeine do they contain?

A 250 ml portion of a typical energy drink – half the standard bottle or can size – contains 80 mg of caffeine per liter – twice as much as a regular cola drink, but the same as a 60 ml espresso.

Experts have warned that energy drink full of caffeine could fuel a record rise in the diagnosis of irregular heartbeat, one of Britain's biggest killers.

One energy drink per day can cause arrhythmia, an abnormal heart rhythm that five-fold increases the risk of stroke.

It is thought that this is because excessive caffeine use dramatically increases the amount of calcium released into the cells of the heart and disrupts the electrical rhythm.

Experts also warn that the addition of large amounts of sugar in energy drinks may be a reason for their potential.

How much sugar do they contain?

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Campaigns such as Action on Sugar have called for a complete ban on products for children under the age of 16.

Their December 2017 study found that the average sugar content was higher than the maximum daily recommended number of adults for sugar intake in the UK.

Similarly, 78 percent of the products exceeded the maximum daily sugar intake recommendation for a seven to ten year old child – 24 g or six teaspoons.

Certain manufacturers reformulated before the Soft Drinks Industry Levy in April 2018 in the UK.

It would mean that a 250 ml Red Bull energy drink with 27 g of sugar (five and a half teaspoons) now costs an extra 6p.

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Before the 2017 reformulation, Rockstar's punched energy and Tropical Guava Flavor products contained a staggering 78 g or 20 teaspoons of sugar per 500 ml serving – more than three times the daily recommendation of 25 g for women and 38 g for men.

Now these drinks contain 24 g of sugar per 500 ml, the equivalent of six teaspoons per 500 ml.

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