In part-two, Caroline's diet experiment reveals spectacular weight-loss, along with worrying health implications. Shalin lifts the lid on fats and oils and Sandro navigates Australia's confusing food labelling system.

Being lonely is the silent health crisis deadlier than obesity. The doctors explore why and give advice on how to make new friendships that last.

The doctors reveal which complimentary therapies actually work, when to get screened for cancer and how to create nutritious lunchboxes.