The findings of both the studies concluded that fruit juices should not be counted as one of the five-a-day and consumption of dried fruit needs to encouraged, the Daily Telegraph reported.
The first study, carried out by a team from the Bangor University in North Wales, found that even freshly squeezed fruit juices can contain as much as five teaspoons of sugar per glass because the squeezing process concentrates their sweetness.
This is around two-thirds of the amount found in a can of soda and can contribute to obesity and also disturb blood sugar levels and the body's natural metabolism.
Researchers said that the juices should be taken off the five-a-day recommendations so that people are encouraged to eat whole fruits and vegetables instead which have far more nutrients per calorie.
Dr Hans-Peter Kubis, who led the research, said that the fruit juices could encourage a "sweet tooth."
"I'd question the wisdom of including fruit juice in the five-a-day message. The problem is people often substitute them for real fruit which is a mistake," he said.
From the June 14, 2011,Prepared Foods' Daily News.