Watch: What is intermittent fasting and how does it work?
Dr Sarah Schenker is a registered dietician and is here to discuss intermittent fasting.
This is a popular way of controlling weight, with a number of regimes from alternate fast days to the 16:8 method and the famous 5:2 diet.
Dr Sarah suggests high-protein, high fibre and liquid food on your fast days to keep you feeling fuller for longer.
For all the latest videos to help you be inspired, informed and entertained, visit https://uk.yahoo.com/topics/at-home/