What is your diet? FWIW I'm in the same boat: both my parents have hypertension, one is a smoker, the other isn't, one is overweight, the other isn't. My mum has taken heroic hypertensive doses to keep hers at bay, for decades. I've been diagnosed with it in my 20s when I was fit as a fiddle... it must be a genetic component, though these days I do believe it's because of a diet too high in carbs than my genes can handle.

Have a look at the effect of fructose on blood pressure. Low carb seems to work well for me, but I'm not consistent enough to see my BP trend down to the point I can throw my pills away. I'm working on it.

And yeah, the entire salt scare is pretty much nonsense that's slowly being debunked. I have a friend who eats more salt than a goat, and he's got hypotension. Go figure. Hyponatremia is not fun, I tend to use salt liberally these days.