The Weight Watchers programme is undoubtedly one of the biggest names in the world of weight loss today. Over a million people a year in the UK alone are estimated to have attended a Weight Watchers meeting. And it's not just normal people who attend. Weight Watchers have been blessed with many celebrity dieters such as Coleen McLoughlin, Patsy Kensit, Claire Sweeney, Natasha Hamilton, Jenny McCarthy and Sheree Murphy, who have all reportedly followed the diet meal plans in order to shape up and slim down.

As our diet plan review explains, the Weight Watchers diet meal plan effectively promotes a reduced calorie, low fat diet, to encourage weight loss. There is a strong emphasis on group support and a great range of proven recipes within the Weight Watchers programme. The diet meal plan is called Switch and consists of two different diets.

The Points Plan - this allows you to eat and drink anything you want to as long as you stick to a daily points allowance.

The Core Plan - this allows you to eat from a set list of healthy or "core" foods. There's no limit on quantity, you simply eat until you feel satisfied.

There are many critics of this weight loss programme who say that's its an expensive method, and if the two diets don't suit you, you will end up paying a lot of money for nothing. The programme's eating plans do not necessarily promote a healthy diet. Other critics say that it does not stress the importance of exercise enough, which is essential in any sensible weight loss programme.