After poring over 20 studies, David Ludwig, from the Children's Hospital in Boston, MA, says that every doctor should advise his patients to adopt the GI diet, especially as a lifestyle choice to prevent diabetes, heart disease and obesity.
The key is that it differentiates between 'good' and 'bad' carbohy-drates. Instead of banning all sugars and starches, it rules out only those carbs that increase blood-glucose levels too rapidly. This includes most processed foods such as breakfast cereals, white bread and white rice, cakes and biscuits.
Low-GI foods include fruits, vege-tables, pulses and grains, such as brown rice, that have not been overly processed (Lancet, 2007; 369: 890-2).