The 500-calorie diet provides around one-quarter of a person’s daily calorie needs. It can help people lose weight but comes with risks. It is only safe to use under a doctor’s supervision.

Click the image below to find out if a 'crash' 800 calorie total diet replacement programme can help you lose weight. Get advice about your options and healthy recipes for a less rigorous diet ...

The Fast 800 diet encourages people to eat 800 calories a day, coupled with intermittent fasting and the replacement of some meals with a nutritious shake. You can keep up to date with the latest ...

The hCG diet takes calorie restriction to the extreme. Shapiro explains that this diet allows the consumption of just 500 to ...

Walking daily for one hour can significantly aid weight loss and improve health. Research shows that this routine, combined ...

This involves replacing all foods with specially formulated products such as soups, shakes and cereal bars, providing between 800–1200 calories per day. Only follow a very low calorie diet if a ...