Signatures of Nonlinear Aging: Molecular Stages of Life

ABSTRACT The traditional view of aging as a gradual, progressive process is increasingly being challenged. A growing body of evidence suggests the existence of abrupt transitions in the aging process, marked by sudden molecular shifts. Interestingly, the data indicates that such transitions occur not only in late life but also throughout the entire lifespan. Further research on the nature of such events could enhance our understanding of aging and pave the way for novel therapeutic strategies, including personalized medicine. We propose that these abrupt molecular shifts could serve as biomarkers, dividing the lifespan into distinct stages and providing the foundation for a much‐needed staging system for aging. Furthermore, we argue that the sudden changes may be the hallmarks of aging tipping points, that is, points in time where aging processes are quickly amplified after surpassing critical biological thresholds.