John Gunstad and a team of researchers have discovered a link between weight loss and improved memory and concentration. The study shows that bariatric surgery patients exhibited improved memory function 12 weeks after their operations. "The initial idea came from our clinical work," Gunstad said. "I was working at Brown Medical School in Rhode Island at the time and had the chance to work with a large number of people who were looking to lose weight through either behavioral means or weight loss surgery." Gunstad said he kept noticing that these patients would make similar mistakes. "As a neuropsychologist who is focused on how the brain functions, I look for these little mental errors all the time," Gunstad explained. The research team studied 150 participants (109 bariatric surgery patients and 41 obese control subjects) at Cornell Medical College and Weill Columbia University Medical Center, both in New York City, and the Neuropsychia...