Several ready-made foods are promoted on the Atkins diet. This includes shakes and convenience bars, many of which contain sodium and artificial sweeteners, as well as processed ingredients.

The Atkins Diet book has sold 1.1million copies here ... The company has a 12-week deal with Tesco for the drink's launch and it is hoping to boost its sales in bars and restaurants.

You drink at least eight glasses of water a day ... You can eat vegetables from the start of the New Atkins diet, so you don’t have to lose out on nutrients,' explains Lovisa Nilsson ...