Redox Theory of Aging

The theory of aging states that aging is the decline of the body’s interconnected redox-dependent systems.    

The article Redox Theory of Aging explains that aging is a decline in the interaction between the genome, environmental exposures, and responses of an organism. In this manner, oxidative stress and the imbalance of cellular redox reactions contribute significantly to an accumulative failure of adaptive structures that support the genome-environment interaction. Integrated redox networks ultimately fail due to constant environmental exposure which eventually cannot be sustained by these systems. 

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4392062/