Abstract: A low-sodium seasoning composition adapted as a substitute for common table salt and as a magnesium dietary supplement comprised of from about 40 to about 50 weight percent of sodium chloride in admixture with from about 25 to about 35 weight percent of potassium chloride and from about 15 to about 25 weight percent of magnesium salt, including magnesium sulfate or magnesium chloride. The particular low-sodium salt substitute formulation results in a synergistic or enhanced saltiness taste per unit weight through the combination of the sodium and potassium salts without any potassium-generated bitterness or bitter after-taste sensation because of the presence of magnesium salt which masks or overcomes such bitterness or after-taste while providing desirable magnesium dietary supplementation.