Can fruit juice can be harmful to teeth?
17 Sep 2004

The sugars found naturally in whole fruit and vegetables don't cause tooth
decay.

But, when the juice is extracted from the fruit, or vegetable, the natural
sugar is released.

Once released, these sugars can damage teeth, especially if fruit juice is
drunk frequently. But fruit juice is still a healthy choice.

One glass (150ml) counts as one of the five fruit and veg portions we should
all be aiming for each day.

To help keep teeth healthy, it's best to have fruit juice at mealtimes,
particularly for children. Milk or water are good choices for children to
drink between meals.

http://www.food.gov.uk/healthiereating/food_myths/fruitjuiceandteeth?version=1
http://www.food.gov.uk