system
Given the following post, respond as if you're commenting on Reddit:
human
Why do women tend to live longer than men?

I know men tend to take more risks but what are some other reasons?
gpt
Tons of speculation on this thread.

Currently we believe a big driver to be the estrogen effect. Women produce around 4 times less mitochondrial reactive oxygen species, produce much more superoxide dismutase and glutathione peroxidase...all factors that decrease cellular and chromosomal internal injury. 

Postmenopausal women or post-oophorectic women lose this advantage but it is again seen once estradiol therapy is initiated. 

Testosterone and risky behavior were once thought to be large factors and have since been shown to be minimally involved, if at all. Castrated males have shown no greater longevity no matter the stage in life their testicles were removed.