Water has long been known to be ideal for quenching both thirst and hunger pangs but some people have been taking it a step further. Some dieters have tried giving up all other food and drink for days at a time and living on just the calorie-free liquid.
Many have claimed success on the scales but there have also been other benefits spotted during studies. These have included lower blood pressure and improved cholesterol.
But how much weight can you lose, does it stay off and just how long-lived are the other benefits. A new study has examined just how successful the practice is - and if it is worth doing.
