New weight-loss tool prevents mouth from opening more than 2mm

DentalSlim Diet Control, which uses magnets, has been likened to medieval torture device'

A weight-loss tool that uses magnets to stop people from opening their mouths wide enough to eat solid food has been developed by scientists in order to tackle obesity.

The device, developed by medical professionals from the University of Otago in New Zealand and scientists from Leeds in the UK, can be fitted by dentists and uses magnetic components with locking bolts.