A daily fiber supplement improved brain function in people over 60 in just 12 weeks. The study showed that this simple and cheap addition to diet can improve performance in memory tests associated with early signs of Alzheimer's disease. However, the prebiotic supplements inulin and FOS were found to have no effect on muscle strength over this period. As populations age globally, the prevalence of age-related conditions such as cognitive decline is on the rise. Researchers sought to understand how targeting the microbiota, the diverse community of microorganisms residing in our intestines, using two cheap, commercially available plant fiber supplements...