Could chocolate stave off dementia?

A daily dose of chocolate could help keep dementia and Alzheimer's at bay, a study suggests.
Researchers found that consuming cocoa every day helped improve mild cognitive impairment – a condition involving memory loss which can progress to dementia or  Alzheimer's – in elderly patients.
For the study, 90 people aged 70 or older  diagnosed with mild cognitive impairment were split into three groups of 30 and given either a high, medium or low dose of a  cocoa drink daily. The drink contained flavanols – chemicals associated with a decreased dementia risk which are found in a variety of foods, including cocoa products such as dark chocolate. 

Source  - Daily Mail