Stefan
36-year-old milkman from Northern Ireland Stefan weighs 37 stone. He describes himself as a 'carb junkie' who lives on potatoes and Irish stew.
He's keen to lose weight to start dating women and get involved in a relationship.
After his milk round, Stefan will eat half a loaf of bread with three eggs while he lies down watching TV.
He'll snack on sweet things all day before going to his mum's for a huge dinner full of carbohydrates.
Stefan knows his diet is appalling. He doesn't want to die at 40, so is now very keen to lose weight.
He has a busy social life which consists of eating lots and talking!
But his size has affected his confidence and he would now prefer to go to people's houses rather than restaurants.
See Stefan's action plan >>
Elizabeth
Writer and musician Elizabeth is 41-year-old from Brentford.
She has a very strict diet.
Every day she will eat a combination of the following types of food- Brazil nuts, fruit and a small bowl of pasta for dinner.
Elizabeth weighs 6 stone 4lbs and admits to being very disciplined with her lifestyle and diet.
She is often described as a 'health and fitness guru'.
See Elizabeth's action plan >>
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