Specifically it is due to reproductive defects in mitochondrial dna as one ages. Anti-aging researcher Aubrey de Gray has a talk on this specific issue: https:

Specifically it is due to reproductive defects in mitochondrial dna as one ages. Anti-aging researcher Aubrey de Gray has a talk on this specific issue: https://www.youtube.com/watch?v=Pm_LboN6eZM https://www.youtube.com/watch?v=Pm_LboN6eZM