 In 1976, Nathan Pritikin opened a centre where patients were put on programme of diet and exercise (the Pritikin Program).This diet is high on carbohydrates and fibre, with fresh fruit, vegetables, and whole grains.A study at UCLA in 2005 showed that it brought dramatic improvement to a group of people with diabetes or pre-diabetes in three weeks, so that about half no longer met the criteria for the disease.