Heart

As the brain ages, it begins to shrink (atrophy) and has less volume. A decrease in volume is considered a sign of brain aging. In patients with dementia, or the most common form – Alzheimer’s disease, there was significant proof of more severe decrease in brain volume. The body size is directly proportionate to the volume of the brain, the more body fat the lesser the volume. That link was also observed by the researchers in participants who did not have any sign of heart failure or coronary heart disease.