This test is generally used to show a tendency towards diabetes. The holistic practitioner can also use the GTT to confirm a hypoglycaemic state . An individual is given a 75-ml loading dose of a glucose solution after having fasted for at least 6 hours. Blood samples are taken every 30 minutes for 2.5-5 hours to establish whether or not the body’s sugar control is being maintained. The blood sugar level should rise initially and drop as insulin levels rise to combat this change. The sugar level should drop below the normal threshold at which blood glucose is maintained and then rise again as the insulin levels drop.