AHA Scientific Sessions 2026 AbstractNov 9, 2026, 00:39 GMT

Type 2 diabetes and obesity linked to faster brain aging

Across 12 cohorts, type 2 diabetes was linked to a brain age gap 1.73 years higher than in people without diabetes.

Paper by Filippos Anagnostakis · Univ of Pennsylvania

Brain cross-sections show wider and narrower tissue gaps, with groups of upright figures nearby and blood cells beside the larger brain.

Our read

Populations

Studied:: Meta-analysis of 47,994 participants from five countries, against people without diabetes
What changed:: Brain age gap was 1.73 years higher with type 2 diabetes than in people without diabetes
The catch:: Brain age was estimated by a computer model as a proxy for brain aging
In the record:: One of 8 papers on intensive glycemic control on record: 3 with results in people.

Editor of record: Boris Djordjevic · AgingResearch.News

Paper

The 47,994 participants from five countries contributed brain scans to a meta-analysis of 12 observational cohorts. A computer model estimated brain age, which researchers compared with participants’ actual ages. Type 2 diabetes and obesity were linked to higher gaps, with stronger associations in midlife and in males. Obesity was linked to a 1.24-year higher gap than in people without obesity.

Two randomized trials tested interventions. In ACCORD-MIND, the gap’s change over time did not differ significantly between 287 participants assigned intensive blood sugar control and 316 assigned standard treatment. In Look AHEAD, a weight-loss program involving 152 participants did not significantly alter the gap at 10-year follow-up compared with 146 controls.

Why it matters

Age-related brain changes are one concern surrounding type 2 diabetes and obesity. The trials addressed whether blood sugar control or weight loss could modify those changes.

Caveats

Brain age was estimated by a computer model as a proxy for brain aging, and people with diabetes or obesity in the cohorts may also have had other unmeasured health differences. In addition, the two clinical trials assessed brain scans in only a few hundred participants over the studied timeframes.