I think you'd agree that having hypertension at 17 is not typical, but being 17 and consuming a LOT of salt (junk food) is very typical.

So which is more likely; you're genetically predisposed to hypertension, which your high-salt diet exposed in your teens, or that your high-salt diet caused your hypertension?

I doubt your conclusion, but it does make me happy that you've found a solution that works for you!