Human study · Aging · 2 Nov 2026
In adults over 50 followed for 24 years, a higher body mass index lined up with a faster drop in memory and thinking
Source: ScienceDaily
What the research found
University of Georgia researchers followed more than 8,200 adults over age 50 for 24 years and reported that each one-point rise in body mass index lined up with a faster decline in memory, overall thinking, and executive function. The association was strongest at year eight, and adults older than 65 showed the most pronounced pattern. Lead author Suhang Song said that people who managed body weight had a slower rate of cognitive decline within two years. The cohort study does not show that body weight causes cognitive impairment. The news report says excess weight may promote inflammation, impair blood circulation, and worsen metabolic health via insulin, which could raise the chance of cognitive impairment, Alzheimer's disease, and other dementia. Published in the Journal of Neurology (2026; 273 (2); DOI 10.1007/s00415-026-13696-2). ScienceDaily dated the story 2 November 2026. Not medical advice.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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