The 5:2 diet is based on a principle known as intermittent fasting (IF), where you eat normally for 5 days a week and fast on the other 2.

Evidence on the effectiveness of the 5:2 diet is limited when compared with other types of weight loss methods. 

One 2013 study compared women placed on a 5:2 diet to those on a Mediterranean diet. 

More people lost more than 5% of their weight on the 5:2 diet, and body fat loss and insulin sensitivity was better on the 5:2 diet. 

But the weight loss for the 5:2 diet and the Mediterranean diet was similar overall.  

Rosemary Conley's diet and fitness plans combine a low-fat, low-GI diet with regular exercise. You can follow her recipes or her various diets and fitness programmes. 

You're encouraged to eat food with 5% or less fat, with the exception of oily fish, porridge oats and lean meat. 

Her online weight loss club has a range of tools and videos covering cooking classes; medical, psychological and nutritional advice; and exercises for all fitness levels. There's also support and motivation from trained coaches. 

You learn about calorie counting and portion size, which can help you sustain your weight loss beyond the programme. 

The diets are designed to help you lose 14lb in 7 weeks and encourage lifestyle change. How long you stay on the plan depends on your weight loss goal

The majority of vegetarians are lacto-ovo vegetarians, in other words, they do not eat animal-based foods, except for eggs, dairy, and honey.

Studies over the last few years have shown that vegetarians have a lower body weight, suffer less from diseases, and typically have a longer life expectancy than people who eat meat.