Face it the job involves sitting in an aluminum tube.flying 80% or more of the speed of sound, surrounded by electrical wires (and God knows what else) maintained by.
..nevermind..with absolutely no normal body rest cycles,.breathing recycled dry air, being irradiated by the sun, eating food whose sanitary qualities are at best questionable.
..must I go on??? and I love it
....but it does not contribute to longevity for sure..