Key points from article :
Scientists discovered aging clocks that track random changes in cells.
Damage to cell building blocks is random, and these changes accumulate with age.
Increased random variation in gene activity can also be used as an aging clock.
Based on available datasets, smoking increases random changes, while calorie restriction lowers them in mice.
Reprogramming human cells to stem cells reverses the age-related noise.
The study suggests interventions targeting random changes could slow aging or rejuvenate cells.
Research by David Meyer and Björn Schumacher from CECAD, published in Nature Aging.
