25 Jan 2018 Blackmores Institute Body mass and the aging brain 25 Jan 2018 Share Share on LinkedIn Share on Facebook Share on Twitter Share on Google+ Share on Pinterest News A high body mass index (BMI) during mid-life could be a risk factor for dementia, yet a high BMI in late-life could yield a protective effect the International Journal of Obesity, reports. × To continue reading this article, please Log In or Sign Up for access.