They are available for as little as 49c a can but the long-term effects of regularly consuming trendy energy drinks are unknown, a new report from Safefood warns.
It said there are particular dangers in mixing these drinks - which can contain up to 16 teaspoons of sugar and are high in caffeine - with alcohol.
The energy drinks, which can cost from 49c to €1.99 a can, are extremely popular with young men aged 15-24. Over half this age group say they consume them at least one can a week.
However, Safefood's director of human health and nutrition, Dr Cliodhna Foley-Nolan, said: "A typical small, 250ml can has sugar levels of six teaspoons which is equivalent to a full chocolate bar.
"The caffeine content is high - and drinking two small cans and one small espresso of coffee drives an adult's daily caffeine intake above recommended levels," she added.
Dr Foley-Nolan said mixing these drinks with alcohol left young people in particular at risk of binge-drinking.
Safefood said they are not suitable for children under the age of 16 or for rehydration after sport.
Source: Eilish O'Regan, Irish Independent, 15/03/16