I grew up on a farm/cattle ranch where my grandfather was born. We had a deep good well, ate our own beef (and wild game) as well as our own pork, lamb, chickens and drank raw milk from our cows.
Grandpa lived to 90, grandma was 104, both my parents are still alive, and I’m 61.
...so I would say good genes, and many blessings from on high.