Middle-aged? Being Overweight or Obese May Age Your Brain 10 Years

Middle-aged? Being Overweight or Obese May Age Your Brain 10 Years

A new study published in the journal Neurobiology of Aging from the Department of Psychiatry at the University of Cambridge reveals that middle-aged adults who were overweight had reduced white matter volume in the brain, which, researchers say, represents around a decade of brain aging.

Professor Paul Fletcher, senior author of the study, says, “We’re living in an aging population, with increasing levels of obesity, so it’s essential that we establish how these two factors might interact, since the consequences for health are potentially serious.”

The Study

brain health, obesity, brain aging
Example of grey and white matter segmentations – a) lean (56 years, BMI 19.5) and (b) obese (50 years, BMI = 43.4).

Researchers conducted a cross-sectional study where they analyzed data from 473 cognitively healthy adults between the ages of 20 and 87. Based on the BMI (body mass index) of the 473 participants, 246 were classified as lean, 150 were classified as overweight, and 77 were classified as obese. Using magnetic resonance imaging (MRI) researchers also analyzed the participants white and gray matter of the brain.

Results

Compared to the participants that were classified as lean, those who were overweight or obese were found to have significantly reduced white matter volume. Researchers also found that overweight and obesity appeared to have “the most detrimental impact on the brains of middle-aged adults.”

brain health, obesity, brain aging
Age-related change in white matter volume in overweight and obese subjects estimated to equate to an average increase in brain-age of 10 years compared to controls.

According to the study, middle-aged adults who were overweight or obese has a white matter volume that was comparable to those of lean adults who were 10 years older.

Prof. Paul Fletcher stated, “The fact that we only saw these differences from middle age onward raises the possibility that we may be particularly vulnerable at this age. It will also be important to find out whether these changes could be reversible with weight loss, which may well be the case.”

Source: http://www.neurobiologyofaging.org/article/S0197-4580(16)30140-3/abstract

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