Not just young people. High blood pressure runs in our family. A cousin, despite being healthy in most indicators, developed high blood pressure at 23. She's still going in her 50s just fine but has had to take blood pressure meds for the last 27 years.

Or insulin. I’ve been shortsighted since childhood and will need to wear glasses for the rest of my life (unless I get laser corrective surgery, I guess).

Many people in my wife’s family have thyroid gland dysfunction and have to take thyroid hormones their whole lives.