Reactive oxygen species aging describes age-related increases in production and persistence of reactive oxygen species. While ROS act as signaling molecules at low levels, excessive accumulation causes damage to DNA, proteins, and lipids. Aging mitochondria become less efficient, leading to greater ROS leakage. Reactive oxygen species aging contributes to cellular senescence, inflammation, and metabolic dysfunction. Persistent oxidative stress amplifies aging processes and disease susceptibility. Understanding ROS dynamics clarifies how oxidative signaling shifts from adaptive to damaging during aging.
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