Series 2 Revisited: Programme 4
Tonight's programme features Diane Leen, a civil servant from Killarney in Co Kerry.
A year ago Diane had to confront the things that were wrecking her health - cigarettes, a high fat diet and too much partying. But improving your lifestyle is not a quick-fix solution and requires a long-term commitment. So Dr Mark returns to Killarney to see if Diane has made her new lease of life permanent.
Click here to view Diane's profile.