Posted: 10/04/2015 at 20:00
I'm liking BBC Health - Being overweight Reduces risk of developing Dementia
The team at Oxon Epidemiology and the London School of Hygiene and Tropical Medicine analysed medical records from 1,958,191 people aged 55, on average, for up to two decades.
Their most conservative analysis showed underweight people had a 39% greater risk of dementia compared with being a healthy weight.
But those who were overweight had an 18% reduction in dementia - and the figure was 24% for the obese.
"Yes, it is a surprise," said lead researcher Dr Nawab Qizilbash.