MORE than a third of teenagers admit to using caffeine tablets or energy drinks to help them study, research found today.

A study by the School Food Trust found that students revising for exams skip meals, do less exercise and indulge in more junk food.

The poll of 500 13-17-year-olds reveals Britain’s teenagers often underestimate the importance of healthy living while studying for GCSEs and A-levels.

It found that less than half think that eating properly is important to help them revise, with less than one in five feeling that exercise was important. Eight in 10 agree that they are more likely to snack more.

In addition, four in 10 have skipped meals to make time to revise, and nine in 10 regularly feel tired because of their school work. One in four use energy drinks, while 11 per cent admit to using performance enhancers like caffeine tablets.