Obesity & Brain Health: Long-Term Cognitive Effects
New research definitively links obesity to accelerated brain aging and cognitive decline. A groundbreaking study reveals how sustained obesity patterns directly impact brain structure and function, potentially increasing the risk of neurodegenerative diseases. Professor Anqi QiuS work, leveraging the UK Biobank, identifies concerning trajectories linked to cognitive impairment, highlighting the critical need for long-term weight management to safeguard brain health. individuals with increasing or stable obesity experienced significant brain deterioration compared to those with stable, healthy weight. Published by News Directory 3,this study underscores that reducing both the severity and duration of obesity can be key to maintaining cognitive function.Discover what’s next as researchers explore the neural mechanisms linking obesity and cognitive health.
Study links Obesity to Progressive Brain Deterioration
updated June 15, 2025
Hong Kong – New research highlights the significant role of long-term obesity in accelerating brain aging and cognitive decline. Anqi Qiu, a professor at Hong Kong Polytechnic University, led a study examining how different obesity trajectories impact brain health in adults. The findings, published in Nature Mental Health, suggest that sustained obesity can lead to progressive deterioration of brain structure and function.
The study, utilizing data from the UK Biobank, analyzed over 500,000 participants aged 40 and above.Researchers identified five distinct obesity trajectories: low-stable, moderate-stable, high-stable, increasing, and decreasing.The results indicated that individuals with increasing, moderate-stable, and high-stable obesity patterns experienced progressively greater impairment in brain structure, functional connectivity, and cognitive abilities compared to those in the low-stable group.
Specifically, the increasing trajectory showed initial adverse effects in the fronto-mesolimbic regions, while the moderate-stable group exhibited impacts extending to parietal and temporal regions. The high-stable group displayed widespread brain abnormalities. Those in the decreasing trajectory, however, showed minimal adverse effects.
The research underscores the importance of long-term monitoring and management of obesity to preserve brain health. it suggests that persistent obesity could serve as a potential biomarker for assessing brain aging. Reducing both the severity and duration of obesity exposure may be crucial for maintaining cognitive function.
“As the aging population grows, there has been a notable rise in neurodegenerative diseases, such as Alzheimer’s disease, Parkinson’s disease, and others, that currently lack a cure. This research proposes that maintaining long-term weight control can contribute to improved brain health,” said Qiu.
What’s next
Looking ahead,Qiu’s team plans to integrate multi-omics approaches to further explore the biological pathways influencing both brain and body health,seeking to understand the neural mechanisms linking obesity and cognitive health.