Kosher Salt
This may be worth a try for people with high blood pressure. Kosher salt may give you more salty flavor with less actual salt — and less sodium — than if you sprinkled table salt on your food. The larger crystals impart more flavor than finely ground salt. You’ll still need to measure carefully; a teaspoon of Kosher salt has 1,120-2,000 mg of sodium, while the daily limit for most people is 1,500 mg. And in cooking, the taste advantage is lost.
Source: WebMD.com