New research suggests that coffee may help to stave off the onset of Alzheimer's Disease.

Jeremy Hughes, chief executive of the Alzheimer's Society, believes it is a "positive piece of research" but he warns not to go "rushing out and assuming that a couple of cups of coffee a day will prevent us getting Alzheimer's".

"The key issue is to have more big studies like this to check out the findings", he told the Today programme.

Simon Ridley, of Alzheimer's Research, said "we've got a lot of the pieces of the puzzle but we haven't put them all together yet".

He told James Naughtie that research has increased but what is needed is a "sustained and significant investment in research over a long period of time".

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