Fat Loss 4 Idiots relies on calorie shifting – a similar principle to rotation diet, calorie cycling or zigzagging. It claims to increase the body’s metabolism and fat burning by eating the right foods at the right intervals to get slim.

The latest cleanses touted as energizing, slimming and more satisfying. No longer advertised as weight loss programs, these new detox diets move beyond the old way of detoxing – whereby dieters adhere to an all liquid diet.

Detox diets (aka Cleanses) claim to renew or detox the body. They believe that nutritional deficiencies, congestive problems and consumption of harmful substances cause a build-up which prevents the body from properly eliminating toxins.

We may want to eat a healthy balanced diet. But what does a serving size actually look like? If you’re unsure, read this hand-y (sorry for the pun!) guide.

Founded in 1969 by Margaret Miles-Bramwell, Slimming World is a diet program with weekly meeting throughout the UK. It encompasses healthy eating, exercises and support groups to help in weight-loss and long-term weight maintenance.