High caffeine energy drinks
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High caffeine energy drink warning

10 July 2013 Last updated at 16:10 BST

There are calls for tighter controls to prevent children consuming high caffeine energy drinks.

The organisation that represents manufacturers has told a BBC Scotland investigation children should not be drinking them.

Research for the European Food Safety Agency suggests more than two-thirds of the UK's 10 to 18 year olds have consumed high-caffeine energy drinks.

A leading academic has said it is time to do more to stop it happening. BBC Scotland's science correspondent Kenneth Macdonald reports.