[beagle3]

By all means, if you already have hypertension, it is good advice to reduce salt intake - I don't know what the posterior probability for salt sensitive hypertension given hypertension, might be >50%, and it is definitely prudent especially since AFAIK there's no definite test for salt sensitivity.

However, iirc (can't review now), the data supports the following:

A) on average, if hypertension, reducing salt reduces blood pressure. But so does adding potassium.

B) despite that, there is a population with hypertension for which salt reduction does not reduce blood pressure.

C) In healthy individuals, increase of salt intake increases blood pressure slightly, but does not get to the hypertension realm.

But the often repeated meme "salt causes hypertension" is not supported by data. Furthermore, sodium deficiency is a serious condition, which was practically unheard of before the low sodium craze.