Dr Xand van Tulleken and dietician Hala El-Shafie ask ordinary Brits to road test some of the most popular and talked about diets out there.
Daria and Emma have seven days to drop some pounds for a party. Bridesmaids Emma and Elisa test drive a six week diet plan. And Dom and Adam prepare to slim over four months.
Stefanie and Jade have 10 days to slim for a clothing label launch. Matt and Robb battle the bulge for a university reunion. And Vicki and Kerry get fighting fit for a mud race.
In a bid to lose weight in ten days, Amber and Roisin try the Dukan lean protein diet and the mono-meal weight-loss regime. The abs and the South Beach diets are also tested.
Emma tries the baby food diet as Kaye adheres to a strict veg/protein ratio for 10 days. Kate gets a glass of champagne a day while Eve draws the short straw with the bland diet.