When following the high-protein, low-GI (glycaemic index) diet, you alter the types of food you eat in order to increase the gut hormone signal to your brain and trigger the ‘stop eating’ signal.

The glycemic index (GI) is a scale from 1 to 100. Each food gets a score, and the lower the score, the longer that food takes to raise a person’s blood sugar levels. Milk is a low-GI dairy product.