Drinking fruit juice is not the same as eating whole fruit. While eating certain fruits like apples and grapes is associated with a reduced risk of diabetes, drinking fruit juice is associated with the opposite. Juices contain more concentrated sugar and calories. They also have less fiber, which makes you feel full. Because juice can be consumed quickly, it is more likely than whole fruit to contribute to excess carbohydrate intake. For example, research has found that adults who drank apple juice before a meal felt hungrier and ate more calories than those who started with an apple instead. Children who drink juice instead of eating fruit may similarly feel less full and may be more likely to snack throughout the day.
Juice may also be a “gateway beverage” — 1-year-olds who drank more juice also drank more sugary beverages, including more soda, in their school-age years. Children’s excessive consumption of juice has been linked to an increased risk of weight gain, shorter stature and cavities. Even in the absence of weight gain, sugar consumption worsens blood pressure and increases cholesterol.