Mines been on since early 30s.. Working in deep mines will take years off your body quick.. I'm 45 and when my stomach ruptured in '15,, Dr said my body was on par with a 65 year old.. I've had 8 surgeries since '15.. With 2 known more to go.. Left knee and left shoulder..Enjoy your 20's, 30's and 40's cause after 50 that check engine light is gonna come on.