Media playback is unsupported on your device

Tougher action on obesity urged

Tougher action - including taxing junk food - is needed by all governments if the obesity crisis is going to be tackled, experts say.

The international group of researchers, who have published a series of articles in The Lancet, said no country had yet got to grips with the problem.

They said changes in society meant it was getting harder for people to live healthy lives.

Branwen Jeffreys reports.

  • 26 Aug 2011
Go to next video: 'Obesity as serious as smoking'