19-year-old Stuart weighs in at 19 stone living on a diet of beer, fatty snacks and frozen food. He undertakes a complete lifestyle change as he tries to reduce his calorie count by half, with a personal trainer to help.
Sixteen-year-old Ellouise from Newbury enjoys the finer things in life, but the good life is affecting her health. Weighing in at just over 14 and a half stone she is determined, along with mum Sarah, to shed some pounds.
18-year-old William, who is autistic and has eaten the same lunch of burger and chips every day for two years, goes on a tailored diet to reduce his calorie intake by half as he and his family agree to a wholesale lifestyle change.
Sixteen-year-old Anna from Warrington weighs in at almost sixteen and half stone as her appetite has got out of control, while her mother Sarah is the perfect partner in crime.
Cleo is 16-years-old and weighs in at just over 23 stone thanks to a diet of unhealthy convenience food and fizzy drinks, but she and her family change their lifestyles to try to halt their weight gain.
Latvian-born Kaspars, 18, weighs in at just over 17 stone, and tries to reduce his intake of fast food and takeaways with the help of a specially tailored diet.
Dominique loves food, but her problem is she does not know when to say no. The 17-year-old, who weighs just over 18 stone, embarks on six weeks of dieting and exercise in an attempt to shed the pounds.
18-year-old Lucy's habit of comfort eating is out of control and eating through boredom has meant a weight gain of over three stone in two years. Lucy and her mother agree to a wholesale lifestyle change to help them both.
19-year-old TJ from Folkestone escapes the chaos of family life by playing computer games and snacking, causing his weight to reach over 19 stone. He's worried that if he doesn't act now his younger brothers will follow in his footsteps.
Nineteen-year-old student Leanne lives near a number of tempting takeaways, including a cafe, a Chinese and a chippy, but is determined to change her lifestyle and lose weight.
Sixteen-year-old Jake lives in Peterborough with his mum Nikola, and because his late-night gaming and fast-food habits are out of control, so is his weight.
After her father had a stroke, 15-year-old Rosie realised it was time to make some changes to her lifestyle. She wants to slim down so she can fit in her prom dress but her healthy living plan is made more difficult by lockdown.
