 Only a few were getting enough blood to the brain, and many had obvious impairments in cognitive function. By putting them on a daily regimen of specific supplements, we hoped we would be able to increase perfusion, a fancy word for improving blood flow to the brain, and reverse some of that damage. After six months, the players' follow-up brain scans told a completely different story than their baseline images, showing increased blood flow in areas important for executive function, memory, vision, and coordination.