In the final two months of the diet, the volunteers' bodies are fighting back.
It is time to see if personalised dieting will work in everyday life.
The volunteers are put through a series of tests to understand their eating behaviour.
11/15 Flying doctor Kariem braves a 5,000-foot drop to rescue a man in the Blue Mountains.
14/15 Flying doctor Tom is in a race against time to get a stroke victim to hospital.
13/15 Rookie flying doctor Eoin is scrambled to a badly hurt photographer in the bush.
12/15 Flight nurse Sue takes off with a 99-year-old patient on a tricky flight.
15/15 Dr Carla helps a man who walked a mile through the bush with a broken back.
10/15 Flying doctor Chris touches down in a Sydney park to treat a young patient.