Scientists studied 1,394 people whose mental functioning was assessed every two years for around 14 years.
In the 142 individuals who went on to develop Alzheimer's, earlier onset was closely linked to Body Mass Index (BMI) at 50 years of age.
In the 142 individuals who went on to develop Alzheimer's, earlier onset was closely linked to Body Mass Index (BMI) at 50 years of age.