Salt does NOT raise your blood pressure. Try it. The low salt, low fat diet causes obesity and heart disease.
Salt does a variety of good things for you. It normalizes the sodium potasium ion pump mechanism without which your cells can't work and your heart stops beating.
Salt is an excellent antibiotic. It kills bad germs and viruses and even parasites. It is also an excellent preservative.
It's almost immpossible to get too much salt in your system. Historically salt has been used for money and has always been used for healing purposes.
Of course if you still believe in the medical profession, their drugs, and all their propaganda I guess you'll be scared to try the natural way.