In the final episode, 45-year-old Tina Collett discovers the damage her diet is doing to her skin, 49-year-old ex-policeman Rich Jones scores the worst body age seen so far, and 68-year-old Isabella McTaggartlearns how to reverse her brain's decline. If you've ever worried about ageing or wanted to turn the clock back then this programme is going to show you how to do it.