Eating whole fruits provides fibre and roughage, which gets filtered while making juice. The fibres present in the fruits aid digestion.
Consuming fruits gives you a sense of fullness. This prevents you from overeating or eating calorie-rich foods, thus helping lose weight. Juices are not as filling as fruits as the fruit's pulp gets filtered out.
Fruits contain natural sugars, which are good for your health. However, if you go for packaged juices, they have added sugars, which are extremely unhealthy for the body.