Higher BMI May Speed Up Brain Aging, Study Warns
Brain aging risk may increase with excess body weight, according to new research from University of Georgia. Scientists found that higher body mass index, or BMI, may speed up cognitive decline in older adults. The study suggests that weight management could play an important role in long-term brain health. Researchers linked higher BMI to faster declines in memory, focus, and decision-making skills. However, they also found that improving weight control may slow these changes over time.
Researchers Found Faster Cognitive Decline
The study followed more than 8,200 adults over age 50 for 24 years. Researchers analyzed changes in BMI alongside brain health and cognitive performance. They discovered that every increase in BMI was linked to faster mental decline.Scientists observed sharper declines in memory and executive functioning. These skills help people stay organized, manage emotions, focus attention, and complete daily tasks. In healthy aging, these changes usually happen slowly. However, higher BMI appeared to accelerate the process.The strongest connection appeared during the eighth year of the study. In addition, adults older than 65 showed the clearest signs of faster decline.Researchers explained that excess weight may increase inflammation and reduce blood flow to the brain. Insulin resistance may also damage brain function over time. As a result, obesity may raise the risk of dementia and Alzheimer’s disease.
Weight Management May Protect Brain Health
Researchers also shared an encouraging finding. People who managed their weight lowered their rate of cognitive decline within two years. Therefore, scientists consider BMI one of the most controllable risk factors for healthy aging.According to the study, obesity rates remain high in the United States. Researchers noted that millions of people already live with dementia. Experts expect those numbers to rise sharply by 2050.Scientists emphasized that dementia currently has no cure. Because of this, prevention remains extremely important. Maintaining a healthy weight, staying active, and improving overall health may help reduce future brain aging risk.
