Brian Harrison weight was more than 170 KG when doctor diagnosed that he was a patient of diabetes. Higher glucose level is dangerous for everyone but for people who are fat have more danger from diabetes.
Doctors prepared a diet for Brian so that he may lose weight rapidly but the diet was based on more foods than before. He had to eat more so that he may lose weight.
You may ask how is it possible that someone loses weight by eating more? Than answer is that the new diet was based on fruits and vegetables with lower fats and lower calories.
Eating these fruits and vegetables made him full and he completely avoided junk food and soft drinks. He was prohibited from having any snacks, cakes or any food which may increase weight or sugar level.
Now he weights only 75 KG, he is healthier and has his sugar level is in control.