Fruit Juice Diet Can Anybody Tell Me About The Juice Diet?

Can anybody tell me about the juice diet? - fruit juice diet

My daughter is 13 and weighs 9 stone is 13 pounds overweight. He went to see a doctor, not because the normal diet together with her. The doctor said that the nutrition of fruit juices and work for you will be back to normal weight and stay healthy. Can anyone tell me this about? How do you use? and it is risky?