Life-course clinical obesity linked to signs of brain health changes in midlife
New research from the Bogalusa Heart Study has found that greater exposure to clinical obesity during young adulthood is associated with a greater burden of white matter changes in the brain by midlife, providing new insight into how metabolic health across the life span may influence brain health.
A new study from the Bogalusa Heart Study has discovered that high levels of clinical obesity during young adulthood are linked to brain health issues in midlife. The research, published in Neurology Open Access, utilized the clinical obesity framework established by The Lancet Commission to investigate the connection between obesity and brain health. The Bogalusa Heart Study, a long-term longitudinal study, provided data from 190 participants who underwent multiple health assessments and brain MRI scans.
Researchers distinguished between preclinical obesity, marked by excess adiposity without observable illness, and clinical obesity, characterized by excess adiposity and impairment of organ or tissue function. Participants with a higher cumulative exposure to clinical obesity from young adulthood into midlife demonstrated more white matter hyperintensities (WMH) on their brain MRI scans in their mid-50s.
WMH, which indicate small-vessel disease and other forms of injury, were not significantly associated with gray matter volume.
Dr. Owen Carmichael, from LSU's Pennington Biomedical Research Center, emphasized that the Lancet Commission's definition of clinical obesity helps separate individuals with excess body fat who have serious metabolic health consequences from those who do not. This distinction is crucial in understanding how obesity impacts brain health over time.
The study's findings underscore the importance of considering metabolic health beyond a single point in time, as the effects of metabolic disease can accumulate throughout one's life and have significant consequences for brain aging.
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