Obesity linked to 'worse memory'

"Hunger hormones play a huge role in how much we eat, but it is already recognised that our minds have a key role too.

People watching TV while they have their dinner have been shown to eat more or feel hungrier sooner.

And those with amnesia will have repeated meals in a short period of time.

Dr Cheke concluded: "It is too early to talk in terms of advice, but we are certainly beginning to observe the mechanisms that obesity perpetuates itself."