Andrew Taylor has vowed to eat nothing but potatoes for the entire year.
He joined Paul Henry to talk about why.
Mr Taylor says after realising that he was addicted to food he knew he had to take action.
His aim is to remove almost all enjoyment from food so that he has to find that enjoyment from other, healthier parts of his life, such as spending time with his son.
Before he began the journey he weighed 151.7kg, and after only a month he has lost 10kg.
Watch the video to see the full interview.