AUTHOR=Mattson Mark P. TITLE=Pathways toward and away from a metabolic cliff during brain aging JOURNAL=Frontiers in Science VOLUME=3 YEAR=2025 URL=https://www.frontiersin.org/journals/science/articles/10.3389/fsci.2025.1571009 DOI=10.3389/fsci.2025.1571009 ISSN=2813-6330