Marilyn after surgery
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Reduced appetite after a stomach bypass operation

Surgeon Gabriel Weston speaks to Marilyn who had a stomach bypass and lost over four stone in only six weeks.

The surgery also had a profound affect on Marilyn's appetite.

Horizon:The Truth about Fat is on BBC Two at 21:00 GMT on Tuesday 20 March 2012 or watch online afterwards at the above link.

  • 20 Mar 2012