New research shows that having more body fat is linked to cognitive impairment – and aging of the brain. In a study published in the journal JAMA Network Open, researchers measured the adiposity of over 9,000 participants, collecting data on both total body fat and visceral fat, or the fat around your organs in your abdomen. The participants then took two cognitive tests. The researchers found that higher total body fat and higher visceral fat were associated with lower cognitive scores. They also discovered that compared to those in the lowest 25 percent of body fat, those in the highest 25 percent for total body fat had the equivalent of an additional three years of cognitive aging.