Senolytics improve physical function in old age—not by fixing aging, but by clearing the cells that block regeneration

Senolytics were developed to kill senescent cancer cells. But the bigger story may be what they do to healthy tissue: they clear the zombie cells that secrete factors blocking stem cell function.

The result in human trials: improved walking speed, better chair-stand times, reduced frailty. Not because the drugs are magic, but because they remove the cellular noise jamming the body's repair systems.

This suggests a reframing: senescence isn't just aging's symptom—it's actively preventing regeneration.