Genetic tendency. But is it destiny?

Osteoporosis.

Is it preventable w diet and exercise?

Yeah, probably.

Bones. Teeth. Same stuff?

You’re still going to die. Just buy the minivan already. That way when you go postal at Walmart or whatnot and the news describes the shooter as a pasty balding man driving a taup or tan colored minivan, we’ll know it was you.
Josh